Can not edit anything
Hi. When opening a PDF I got in a mail (pipe-drawing) I am not able to highlight any text anywhere in the drawing. Hence, I can not do "strike-through" or "underscore" or any other things. I can hovewer add stuff like boxes and new text. When checking the Properties - Fonts, the Fonts tab is empty. (I have another PDF where different fonts are listed in the tab, and I am able to highlight text in that one). So I guess the empty Font-Tab is the reason why I cannot edit the document. The document is not protected in any way. My program is Adobe Acrobat Reader v/2023.001.20174 with editing option. Can choose many other tools also.
Is the problem that the document was created in a way that prevents editing? Even though it is not write protected in any way?
