Add bold, italic, underline, or strikethrough to text

Choose the Type tool by doing one of the following:
- Click in the Tools sidebar.
- Choose Tools > Type (from the Tools menu at the top of your screen).
- Press the T key on your keyboard.
Select the text you want to change.

To change all of the text in a text box, select the text box. 
In the Tool Options pane, click one of the text format buttons under the Font pop-up menu.

To remove a specific format, click that button again.

If the font you’re using has other styles available (such as light or condensed), click the pop-up menu above the buttons to choose one of them.
To add strikethrough, do one of the following:
- Click the Font menu in the Tool Options pane and choose Strikethrough.
- Choose Format > Font > Strikethrough.

Pixelmator Pro User Guide