If you didn’t use Layers for different elements, I believe you’ll need to add them and move whatever you don’t want to print to the new layer(s). Then change those layers to Hidden. If you did use Layers, then just change the ones you don’t want to print to Hidden. Then select the a Print option to get a preview. Trouble is what gets printed won’t change in size and there will be a lot of empty space in the printout. You can try playing around with some of the Scale options in the print preview feature, but I’m not sure if that gets you a full page printout of what you see on the screen.
I use the Windows Snip & Sketch tool to capture just what I want to print. To use that simply hit the Windows key and type “snip”. You should see Snipping Tool and Snip & Sketch in the results. Snipping Tool works too, but Snip & Sketch has more options and is their latest tool.