Add shapes, text and connectors for shapes
Create the tree diagram example from above in a new, blank draw.io diagram. Use the Rounded Rectangle shape from the General library, then search for the term Display, using the shape search in the upper section of the library panel. Duplicate the Display shape four times and position them roughly one below the other. Now use the Align and Distribute functions from the Format Panel to first center the shapes vertically and then align them at the same distance. Then select all four shapes, duplicate the set, choose Distribute > Horizontal to mirror the set and position it on the opposite side. Add the text and connectors.
Tip: You can see additional shapes by clicking on + More shapes at the bottom of the symbol library.
Add text and connectors
Click on a shape and start typing to enter text. Text size, font, and color can be adjusted in the Text tab of the format panel, in addition to the position of the text.
Double-click on a text to access the enhanced text options (they will overlay the format panel). This way, you can add numbering or bullet points to your text or set multiple links in your text, if needed.