Now the tutorial
I have loaded a large image into the workspace. Its size is 4368 x 2912 pixels which would be good enough for a printed image of about 14 x 9 inches so it could be printed as 10 x 8 , 7 x5 or 6 x 4 inches quite successfully.
Prepare and save a Crop preset
1. Choose the crop tool. Type in the pixel dimensions 1800 and 1200 . Make sure the Maintain Aspect ratio is ticked.
2. Click the little down arrow beside the presets and then the disk / Save button. The dimensions are shown but you could also add or change that to 6 x 4 inches. Click OK to save that preset.
3. Next time you click the Presets you will find your preset there ready to be used for any other images you want to print as 6 x4 or 4 x 6 inch prints
Preparing your image - defining the crop area , resizing and changing the print pixel resolution (Pixels/inch)
4. Drag the crop rectangle outwards to get it to include what will fit in a 6 x 4 inch print. (Do not make it smaller or the result will be smaller than 6 x 4 and have to be enlarged.) Click the apply and your image will now be the right dimensions to fit into a 6 x 4 inch print but probably larger than 1800 x 1200 pixels, so we need to resize down.
5. Image > Resize will show the resize dialog. Make sure you are working in pixels not percent.
Type in the New dimension of 1800 and the other value should change to 1200 (sometimes you get 1201 or 1199but ignore that). Click Ok and the image will be resized to 1800 x 1200 pixels.
6. Now to change the print resolution. Image > Resize and in the dialog box Tick the Advanced Settings . Untick Resample Using. Now in the Print Size area make sure you are using Pixels / Inch not Pixels / Centimetre.
Change the Resolution value to 300. Click OK . You will see a bit of a flash and nothing else seems to happen, but the image is still 1800 x 1200 pixels but the printer instruction has been changed to tell the printer to print 300 pixels of image along every inch of line.
You can now save your image as a jpg with good quality (10 or less) and print it using whatever program you use for printing - store it on a USB stick and take it along to a printer kiosk to print out as a photo or even print it out using PSP.
Systems available Win7, Win 8.1,Win 10 Version 1607 Build 14393.2007 & version 20H2 Build 19042.867