Have a possibility to select via enlighted sqaures on what date you want your ad to be in a paper

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I created a document in Word and made a pdf out of it. Then I wanted via forms specify which parts could be accessible. The problem-section were 25 dates when den newspaper is appearing. I wanted little squares before the dates, so that I could via mouse click the once where I wanted to place an ad. A year before, this worked perfectly, but now I've spent at least 5 hours and asked aslo some collegues. No result. Can anyone help me? Thanks a lot and kind greetings - Andi form Switzerland

[try67]

Do you mean check-boxes? How are you opening the file, exactly? What application are you using?