Drawing
Cadcorp SIS Desktop has powerful tools to create many common and advanced graphical items.
You can find these tools under the Create tab.
These range from the simple point to different arcs and Bezier curves.
Detailed instructions to use drawing tools are available here.
Text
It is easy to add text almost anywhere in SIS Desktop; in the form of labels, markdown text or simple box items.
Text tools are available under the Create tab.
See here for information on Text objects.
Measuring
SIS Desktop can measure various components of an item (for eg its length, angle, position, route etc).
Measurement tools are available under Home > Measurement.
See here for information on Measuring.