To set the line thickness of an annotation before drawing it:
Click Annotate on the menu bar.
Click Change annotation line thickness and select a thickness. Choose between 1 px, 2 px (initial default), 4 px and 6 px.
Note
The selected thickness becomes the new default for your user account on the computer you are working on.
Select the type of annotation you want to create and draw the annotation.
To change the line thickness of an existing annotation:
Select the annotation.
Note
A selected annotation is highlighted in green.
Click Change annotation line thickness and select the thickness. Choose between 1 px, 2 px, 4 px, 6 px or 9 px.
The line thickness of the selected annotation will be adjusted.