One line of text, placed in one of five spots
Type your text, pick a size and a colour, and drop it in the centre or any of the four corners.
There is no free positioning and no dragging: the five anchor points are the whole layout system. That keeps it quick for the common jobs, which are captioning a screenshot, labelling a photo before sending it, or marking an image as a draft. For anything that needs precise placement or several separate pieces of text, an image editor is the right tool.