You can show various text labelling and annotation options by clicking the down arrow part of the button in the side toolbar. Once you have selected or de-selected the desired labelling items you can click the Ok button at the bottom or must click anywhere in the graphics area to have the labelling change applied.
Displacement annotation can be limited to individual directions for less crowded displacement diagrams.
Clicking the "More options..." item takes you to the following form from where you can change colors, formatting, etc.
Labels for load and analysis result diagrams are normally colored to match the load case based diagram color. If the labels are hard to read then you can try ticking the "Use load case independent color" so that they have their own independent color.