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Free version for Windows desktop computers.

Sticky Notes are probably the most common method used to add notes and comments to PDF documents. To add a Sticky Note, simply click at the "PostIt/Sticky notes icon". A sticky note with the calculation tape will be copied to the clipboard and you can paste it to your documents easily.

Version 7.1.0 now allows to choose the text and background-color of your sticky note. 

Stick it tape calculator

Options:

Adding machine with sticky notes

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Graphic export options for your sticky notes. Set your prefered text color and note background color.

Calculator with sticky note option