So you can browse PDF files to Stcihwörtern
- Open the PDF file in Adobe Reader.
- Then click the tab "edit" and select "Search". Alternatively, you can also use the Shortcut [Ctrl]+[F].
- Now, a search box appears in the upper right corner. Here, you enter the keyword and start the search.
- On the "Next" button you can jump to the next search result.

Adobe Reader: PDF search
PDF files you can edit with GIMP for free. All the Details you will find here.