While viewing the screen you want to capture, drag the Status Bar downward, then tap the Capture+ icon in the Quick settings bar.
Select the desired tool from the toolbar (Pen type, Color, Eraser, ect.). Then create a memo using a fingertip to draw or erase pen marks (don't use your fingernail or any other rigid object).
Tap the Save icon to save the memo or tap the Back Button to exit. If you exit without saving your memo, whatever you’ve drawn will appear the next time you access QuickMemo+.
Tap the toolbar handle (at the top of the screen) to display or hide the Capture+ toolbar options.