This will summon the text editor for the currently selected shape. The letter spacing used by newly created texts. This is called text-anchor because SVG 1.1’s multiline text only uses text-anchor, and this is a slight bit different than text-align (and also the reason justify isn’t available at the moment). This allows you to align text to the left, center it, or to the right. Anchor/Align text to the left/middle/right

It therefore will stay proportionally the same size if you increase or decrease canvas dpi. It is in pts (points), which is a common standard for fonts that is measured 72 points per inch. The letter-size used by newly created texts. The letter type used by newly created texts. This contains features with which to create new texts, the following items are available: Font on a highlighted text will select it as the active text.

Hovering over other text shapes will highlight their bounding box. When releasing a default text will be created and the text editor window will pop-up. You use it by doing + drag to create a rectangular selection. This tool allows you to add text to your artwork.

How to add word art in paint