But unlike Word Docs and other text-based files, its not always clear how to highlight in a PDF.

This guide focuses Adobe Acrobat Reader and macOS Preview.

Open your PDF in Acrobat Reader.

The pen tool in Acrobat Reader showing current color

Select thepenicon in the toolbar at the top of the screen.

You will know the pen tool is active because it changes to the current highlighter color.

Locate the content you want to highlight.

Acrobat Reader text selection feature.

Select and hold at the beginning of it to start your selection.

Keeping the mouse/trackpad clicked and drag the cursor to the end of the area you want to select.

Then let go of the mouse button/trackpad to apply the selected highlighted color.

Acrobat Reader with highlighted text.

SelectFile>Saveto back up your PDF changes.

Right-click thepenicon and selectShow Properties Bar.

Go to theProperties Barand grab the arrow next to the color square to open a color palette.

Acrobat right-click Pen menu with Show Properties Bar selected

choose the highlight color you want from the color palette.

The pen icon in the toolbar is also the same color.

Go to the properties bar and repeat steps 3 and 4 to change the highlight to its new color.

Acrobat Reader Properties bar with color swatch and arrow highlighted

SelectFile>Saveto preserve your PDF changes.

It’s not a problem you’re able to easily remove the highlighting from the document.

Select a highlight you want to remove.

Acrobat Reader Properties Bar color palette

To delete the highlight, select thetrashicon.

Your highlight has been removed.

SelectFile>Saveto back up your PDF changes.

New highlighting color shown on Pen tool in Acrobat Reader

It’s done in a similar manner to how you highlight in Adobe Acrobat Reader.

Open a PDF in Preview.

Click thehighlighter pen toolon the toolbar to activate it.

Acrobat Reader with yellow highlight selected.

You’ll see your selection is now highlighted.

ClickFile>Saveto preserve your PDF changes.

However, you could change the highlighter color and use multiple colors in one document.

Acrobat Reader with the recolored text highlighted.

This launches a drop-down palette, offering several new highlighter colors.

Choose the one you want.

Ensuring the highlighter is still active, grab the content you want to highlight in the new color.

Acrobat Reader with the last highlight highlighted.

ClickFile>Saveto secure your PDF changes.

To delete a highlight, locate the one you want to remove and double-click it.

SelectRemove Highlightfrom the menu.

Acrobat Reader with the bottom highlight selected.

The highlight is removed.

ClickFile>Saveto secure your PDF changes.

Acrobat Reader with the highlight removed.

Highlighter pen tool in macOS Preview app

MacOS Preview with the text selection tool highlighted.

MacOS Preview showing highlighted text.

Arrow next to highlighter pen tool in macOS Preview

Highlighter color palette in macOS Preview

MacOS Preview with text highlighted in purple.

MacOS Preview with the top highlight highlighted.

Remove Highlight selected in macOS Preview

MacOS Preview showing a removed highlight.