​@OfficialNiLen

Line grid not displayed on the frame when exporting to a pdf file

If you are referring to this Line grid:

… then this is expected behaviour, i.e., the line or dot grid is only ever visible when actively on a board.

what should I do?

If you really want grids in your frame/export, you could take a screenshot of the canvas or use a graphic from the internet.

​@OfficialNiLen  I’ll also chime in with Python, esp. the libraries PyPDF2 & reportlab. ChatGPT can whip you out a little Python script that will do the trick. 

A lot of people never consider this route - but with ChatGPT in the driver’s seat you can do a LOT of things with Python!