(08-20-2018, 10:11 PM)Ropke95 Wrote: I have found a printer that prints RGB. Now I just want to know how to make crop marks in GIMP on a design for the printer.
If the printer accepts a PDF Gimp printing options has a tick box for 'Draw Crop marks. Print to a PDF. Many designers use Scribus to set up a page for printing, it has more options than Gimp, crop, bleed, registration marks.
A comparison of Gimp and Scribus crop marks (PDF). https://i.imgur.com/NW1j2X3.jpg
You need to ask the printer their requirements, it might depend on the size of your image, a biz card not the same as a poster.
What you might do in Gimp.
1. Make a template, say, 10 mm extra all round.
Example A 300 x 300 mm image make a canvas 320 x 320 mm (with suitable ppi setting) https://i.imgur.com/8B5c7hG.jpg
2. Set up some guides to define a) the image area (300 x 300) b) the bleed area - usually 3mm extra on all sides. A rectangular selection set to a size and then Image -> Guides -> Guides from Selection works. https://i.imgur.com/UCV4S9Y.jpg
3. Then just paint in the crop marks in each corner following the guides. https://i.imgur.com/WoBKI3p.jpg
4. Import the image to cover the bleed area, turn off the guides: https://i.imgur.com/4eBNp8g.jpg
5. Export the image in whatever format the printer requires, tiff, jpeg...Ask the printer.
6. If your image has a white border then you will not need a bleed area...Ask the printer.