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printing a Square ;-)

Aug 4, 2011, 18:06
Post: #1
printing a Square ;-)
I am a beginner ;-)

I've read the documentation and tred a few tutorials. I can make a square and make the outline around it ( but at the moment can't remember what that's called). I have even created a 2nd square in a second layer ( though I'm not certain I could duplicate it)

I want to create a row of squres accross, and another row down with each sqauare on a layer, These are separate squares, not a grid.

The most confusing part for me is that I want to be able to print these on a standard printer on U.S. standard 8 1/2 x 11 paper. I want them to print approximately 1 1/2 " square ( but may fiddle with that size a bit) So the rows should probably be 5 across and 6 down.

How do I do this? What resolution / scaling should I use in set up? How do I use the guides or grids to end up with a square a particular printed size on standard paper?

thanks
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Aug 4, 2011, 20:49
Post: #2
RE: printing a Square ;-)
(Aug 4, 2011 18:06)BobRob Wrote:  I am a beginner ;-)

I've read the documentation and tred a few tutorials. I can make a square and make the outline around it ( but at the moment can't remember what that's called). I have even created a 2nd square in a second layer ( though I'm not certain I could duplicate it)

I want to create a row of squres accross, and another row down with each sqauare on a layer, These are separate squares, not a grid.

The most confusing part for me is that I want to be able to print these on a standard printer on U.S. standard 8 1/2 x 11 paper. I want them to print approximately 1 1/2 " square ( but may fiddle with that size a bit) So the rows should probably be 5 across and 6 down.

How do I do this? What resolution / scaling should I use in set up? How do I use the guides or grids to end up with a square a particular printed size on standard paper?

Several good questions here.

1) Dimensions: the only pertinent value for a bitmap image is a dimension in pixels. However, when you create your image, the "Advanced options" in the image creation dialog let you specify a resolution. This value is indicative only but useful nevertheless. If you want a decent print quality, set it to 150 or more (typically, 300DPI). In the "Image dimensions" section of the same dialog, you can choose your units. If you choose a physical unit there (inches, millimeters), then Gimp will compute the required image size in pixels for you. Furthermore, when you work in the image later you can give dimensions in inches and they will be converted in pixels, and you can also measure things in inches directly. But this of course assumes the resolution you set when creating the image, and you can later print at a different resolution, producing a smaller or bigger image. You can also change the resolution and print size arbitrarily while working on it (Image/Print size) but you'll notice that Gimp won't change its size in pixels that way.

2) Creating the squares: Layer/New layer (Ctrl-Shift-N), and specify a dimension in inches. For the other square, Layer/Duplicate layer (Ctrl-Shift-D)

3) With the Move tool, drag the squares roughly in position.

4) Align the top left corner square exactly with the two image borders:
  • use the Align tool (icon is the white square with 4 arrows newt to the Move tool icon)
  • Select "Relative to"/"image"
  • Click on the square that should go in the corner, it should be marked with 4 small green squares in the corners
  • In the Align tool dialog, "Align" section, click the left and top arrows. Your square should get positioned in the image corner

5) Align the vertical squares with the image border:
  • Align tool again
  • Select "Relative to"/"image"
  • Click on the first square and shift-click on the others (marked ones get 4 small green squares in the corners)
  • In the Align tool dialog, "Align" section, click the left arrow. Your squares should become aligned with the left border.
  • You can also select/Align them one by one... but this is a good exercise for the next step.

6) Distribute the squares vertically
  • Align tool again
  • get out your calculator... we need to set a value in pixels. The value entered in the "offset" field of the Align tool is the vertical distance in pixels between the top borders
    of your squares (or, since they are all identical, their bottoms borders or their centers).
    For instance, assuming you have 6 1.5"x1.5" squares that you want to spread over 11": 5x(squares+spacing)=9.5" (good old fencepost problem! drop the first post!) so the tops are 1.9" apart, which, at 300DPI is 300x1.9=570. So use a 570 pixels offset.
  • Click on the corner square and shift-click on the others
  • Select "Relative to"/"first item"
  • In the Distribute section, click the top arrow. Your squares should become evenly spread.

The procedure to obtain the horizontal line is left as an exercise to the reader.

Side note: very few printers (especially consumer-grade printers) allow border-to border printing, so "Letter" paper will likely report a printable area smaller than 8.5"x11", and resizing could occur. Do some test prints first, using software you trust (word processor...) to convince yourself that Gimp may not be at fault.

Now answering your questions on
https://Gimp-Forum.net
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Aug 5, 2011, 10:51
Post: #3
RE: printing a Square ;-)
(Aug 4, 2011 20:49)ofnuts Wrote:  
(Aug 4, 2011 18:06)BobRob Wrote:  I am a beginner ;-)

I've read the documentation and tried a few tutorials. I can make a square and make the outline around it ( but at the moment can't remember what that's called). I have even created a 2nd square in a second layer ( though I'm not certain I could duplicate it)

I want to create a row of squires across, and another row down with each square on a layer, These are separate squares, not a grid.

The most confusing part for me is that I want to be able to print these on a standard printer on U.S. standard 8 1/2 x 11 paper. I want them to print approximately 1 1/2 " square ( but may fiddle with that size a bit) So the rows should probably be 5 across and 6 down.

How do I do this? What resolution / scaling should I use in set up? How do I use the guides or grids to end up with a square a particular printed size on standard paper?

Several good questions here.

1) Dimensions: the only pertinent value for a bitmap image is a dimension in pixels. However, when you create your image, the "Advanced options" in the image creation dialog let you specify a resolution. This value is indicative only but useful nevertheless. If you want a decent print quality, set it to 150 or more (typically, 300DPI). In the "Image dimensions" section of the same dialog, you can choose your units. If you choose a physical unit there (inches, millimeters), then Gimp will compute the required image size in pixels for you. Furthermore, when you work in the image later you can give dimensions in inches and they will be converted in pixels, and you can also measure things in inches directly. But this of course assumes the resolution you set when creating the image, and you can later print at a different resolution, producing a smaller or bigger image. You can also change the resolution and print size arbitrarily while working on it (Image/Print size) but you'll notice that Gimp won't change its size in pixels that way.

2) Creating the squares: Layer/New layer (Ctrl-Shift-N), and specify a dimension in inches. For the other square, Layer/Duplicate layer (Ctrl-Shift-D)

3) With the Move tool, drag the squares roughly in position.

4) Align the top left corner square exactly with the two image borders:
  • use the Align tool (icon is the white square with 4 arrows newt to the Move tool icon)
  • Select "Relative to"/"image"
  • Click on the square that should go in the corner, it should be marked with 4 small green squares in the corners
  • In the Align tool dialog, "Align" section, click the left and top arrows. Your square should get positioned in the image corner

5) Align the vertical squares with the image border:
  • Align tool again
  • Select "Relative to"/"image"
  • Click on the first square and shift-click on the others (marked ones get 4 small green squares in the corners)
  • In the Align tool dialog, "Align" section, click the left arrow. Your squares should become aligned with the left border.
  • You can also select/Align them one by one... but this is a good exercise for the next step.

6) Distribute the squares vertically
  • Align tool again
  • get out your calculator... we need to set a value in pixels. The value entered in the "offset" field of the Align tool is the vertical distance in pixels between the top borders
    of your squares (or, since they are all identical, their bottoms borders or their centers).
    For instance, assuming you have 6 1.5"x1.5" squares that you want to spread over 11": 5x(squares+spacing)=9.5" (good old fencepost problem! drop the first post!) so the tops are 1.9" apart, which, at 300DPI is 300x1.9=570. So use a 570 pixels offset.
  • Click on the corner square and shift-click on the others
  • Select "Relative to"/"first item"
  • In the Distribute section, click the top arrow. Your squares should become evenly spread.

The procedure to obtain the horizontal line is left as an exercise to the reader.

Side note: very few printers (especially consumer-grade printers) allow border-to border printing, so "Letter" paper will likely report a printable area smaller than 8.5"x11", and resizing could occur. Do some test prints first, using software you trust (word processor...) to convince yourself that Gimp may not be at fault.

Thanks,
Things suddenly got busy -I will try this as soon as I have a chance to play with it.
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Aug 5, 2011, 12:11
Post: #4
RE: printing a Square ;-)
The great thing about Gimp is "always another way".

If accuracy is not too important:

set up the grid Edit -> preferences -> default grid to say 2"

restart gimp and make a clipboard brush say 420x420 pix. 512x512 is the max.
To do this make a selection, set the size to 400x400, then stroke the selection. Kill the selection, copy the whole thing.

Start a new image using the US letter size, this will be at 300 ppi.

In the view menu enable grid and snap to grid, select the clipboard brush, resize with the square brackets or brush size slider and paint each square in.

Now the hard part, set up the printing dialog for your printer.

FWIW some screen shots. http://i.imgur.com/i43rK.jpg

Next I'm a great believer in the most appropriate tool, and I would have said use Inkscape. But you can do a lot with OpenOffice (LibreOffice) Draw. Since it is vector based, accuracy is easy. If you need to open in gimp, export the page as a PDF. Not going to dwell on it http://i.imgur.com/pyxsn.jpg

Finally the easy way. I use this site for graph paper.
http://incompetech.com/graphpaper/
One of the options is 'design your own' http://i.imgur.com/KDhmk.jpg

** https://www.gimp-forum.net/ now answering questions**
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Aug 8, 2011, 20:19
Post: #5
RE: printing a Square ;-)
Thanks everyone.

Sorry I didn't reply sooner. My new computer arrived and I was busy figuring WIN 7 out ;-)

I intend to finish learning GIMP and use it for photos, however, I've been told by several people that I should be using Inkscape for my current project.

So I'm sure I'll be back in the future, but for now its off to the Inkscape tutorials!

Thanks
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