Step 4: Select your system’s image editor, then close all open dialog boxes Step 3: On Categorie, select TouchUp > Choose Image Editor It can only darken a PDF file with the help of plugins. Step 2: Press “Ctrl-K” to open the Preferences dialog boxīefore we start to darken a PDF file, we need to set up an image editor on Acrobat since Acrobat has no darkening tool itself. It takes practice to master all the properties and special items. However, the program is quite difficult to use. Due to its excellent capability of PDF editing, many designers will use it to create perfect PDF files for idea-sharing. How to darken a PDF file with Adobe AcrobatĪdobe Acrobat is a very famous and powerful PDF editor. Do remember to save the file before you close it.Īfter the 3 easy steps, your PDF file will be darkened and can be identified easily. Then, you can choose a darker color and add it to your PDF file. On the window, locate Color on the Source option. Note: Not sure if there’s a background on this PDF file? Click New Background to proceed.Īfter you choose one option, a popup window appears.
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