To add an item, simply click in an empty box and start to type. At the bottom of each section in each column you will always find an empty text box. If these empty boxes are not visible, select the Lay-out toolbar and click on the Show empty cells button in the View section.
You can edit the text like you would in any word processor using the Text toolbar. You can change the typeface or size, make text bold, underlined, etc. and align the text to the left, right or centre.
If you want to change the appearance of all text in the logframe, or all the text in the Indicators column for instance, use the text selection options to select multiple cells and then modify the text to your liking.