Use callout, cloud, and stamp tools to add notes and comments in a quick and neat way. Snapping will give your notes a neat structure. Special support for hardware keyboards will make text typing quick. All tools are WYSIWYG and you see the final result at any moment.
Note: The construction toolset is currently available only for the iPhone and iPad version of PDF Expert and is a part of the PRO subscription.
Use the arrow tool
- Open a file you’d like to work with.
- Tap the Red Line tab at the top.
- Select the Arrow tool. You can select the color for the tool by tapping the color picker. By tapping the color picker, you also get access to other properties such as the arrow type, thickness, border style, and opacity.
- Tap where you want to insert an arrow.
- To move the arrow, tap and drag it.
- To resize or rotate the arrow, tap and hold, then drag one of the ends.
- To edit the arrow, tap it and select Properties in a pop-up menu.
- To remove the arrow, tap it and select Delete.
Use the callout tool
to add text notes pointing to a specific object on a page.
- Open a file you’d like to work with.
- Tap the Red Line tab at the top.
- Select the Callout tool. You can select the color for the tool by tapping the color picker. By tapping the color picker, you also get access to other properties such as the font and border settings.
- Tap where you want an arrow to point to, then drag to the place where you’d like to insert a callout.
- Type in your note.
- To move the callout, tap and hold it.
- To resize or rotate the callout, tap and hold, then drag one of the ends.
- To edit the callout, tap it and select Properties in a pop-up menu.
- To remove the callout, tap it and select Delete.
Use the cloud tool
to draw attention to the areas that were changed or need to be updated.
- Open a file you’d like to work with.
- Tap the Red Line tab at the top.
- Select the Cloud tool. You can select the color for the tool by tapping the color picker. By tapping the color picker, you also get access to other properties such as the cloud type, border settings, hatch patterns, fill color, and opacity.
Follow the onscreen instructions.
- To move the cloud, tap and hold it.
- To resize or rotate the cloud, tap and hold, then drag one of the ends.
- To edit the cloud, tap it and select Properties in a pop-up menu.
- To remove the cloud, tap it and select Delete.
Note: To undo the changes, tap 
on the toolbar. If you need to redo your edits, tap&hold and select Redo.
If you frequently use a particular shape, e.g. the red arrow, you can add it to the Favorites to work even faster. Learn how to create your own toolset in PDF Expert.