The Set Clipboard to Text action allows you to set the system clipboard to plain or styled text.

Select the clipboard to set from the Set pop-up.

Choose from the to pop-up either:

Enter the text to use in the text area. To set the clipboard to styled text paste already styled text from another source.

Use the arrow at the right of the text area to select variables, calculations, clipboards and other tokens to enter in the text area.

The action allows you to control what text processing happens in the gear menu (7.2+) :

Most other Text Fields in Keyboard Maestro process both text tokens and (except for regular expression fields) backslash characters.