Lightshot Screen Shot Software
This is a great FREE screenshot software that allows you to annotate screen shots on the fly - much better than microsoft's built in snipping tool
Lightshot: https://app.prntscr.com/en/help.html
Create a hot key for easy capture:
With the software installed and running
Right-click the feather icon in the tray (above the clock) to display the options
Find the hotkeys section
Add a check next to General Hotkey
In the text box next to the hotkey selection, enter a series of memorable but uncommon keystrokes (CTRL + Shift + A or CTRL + Shift + L work well)
Once you've selected the area you want to screenshot, Lightshot will present you with tools you can use to mark up the image and then to copy it so you can paste it directly into Slack, a document or elsewhere.
Printing From Lightshot
Grab your screen shot
Select the Printer button
Select the appropriate printer from the printer list