PDF Expert 7 lets you create diagrams and schemes by using different shapes like arrows, circles, and rectangles. You can easily combine different shapes to annotate your document more effectively.
Note: To undo the changes, tap on the toolbar. If you need to redo your edits, tap and hold and select Redo.
If you frequently use a particular shape, e.g. the red arrow, you can add it to the Favorites to work even faster. Learn how to create your own toolbar in PDF Expert 7.