Inside this, check the Replace Document Colors checkbox, then choose the radio button for Use High-Contrast colors. Next, look for the Document Colors Options section at the top.Choose the Accessibility tab from the left sidebar.Open Adobe Reader and head to Edit > Preferences (using the Ctrl + K shortcut if you wish).To toggle dark mode for your PDFs in Adobe Acrobat Reader (formerly just Adobe Reader), follow these steps: How to Use Dark Mode in Adobe Acrobat Reader A file browser box will appear where you can choose the folder and name to save this reduced file.We'll show you how to use Adobe Acrobat Reader in dark mode for an experience that's easier on your eyes.

Here, you can reduce the size of your PDF by adjusting the resolution of the images, although this is a more advanced method, and you need to know at least what parameters are being changed.

The following window will appear, where we can further customize which aspects of the PDF will be modified to reduce its size: Options for manual PDF down-sizing To use this method, go to File, and then, place the mouse cursor over Save as other: Access to manual down-sizingĬlick on Optimized PDF: Access to the PDF optimizer How to reduce the size of a document with the PDF optimizer The size reduction you appreciate may not be excessive, it depends on factors beyond your control (such as whether there are images included in the document or the quality of the document). It is worth noting that the size reduction will not always be drastic, it will not transform a document from several megabytes into something with a few KBs. The operation will be completed in a short time, so we only have to wait. Immediately, you will see that a progress bar appears, informing us how the operation is going: Automatic down-sizing progress We will then enter the name of the file and save it as usual. Click on the button that is highlighted in the window: Folder to save the down-sized document In this case, we will not change it (otherwise, we would click Choose a different folder, although this is redundant because we can still choose the folder where to save the reduced PDF in the next step). The following window will appear, where you can save the file in the directory that Adobe Acrobat Reader set by default, or select a new one.

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