1. First, open the WPS form in the computer and click "Start" in the menu bar, as shown in the following figure.
2. Then in the open start option, as shown in the figure below, find the "Select" function and click it.
3. Then in the drop-down list, click the "Select All" option, as shown in the figure below.
4. In this way, you can select all the contents of WPS text, as shown in the figure below.