Identifying drawings
The browser's ability to identify drawing determines the way how drawings are shown to the user.
The identification of a drawing is based on it's UUID, a unique identifier that sticks to the drawing for its entire life.
There are, however, two situations in which a drawing's UUID is changed:
By changing the unit of length for a drawing, which invalidates the settings (mostly position-based), such as text insert points.
By deciding not to update a drawing during CAD import. If the setting Update CAD Integrator FM drawing in the import definition is set to No, a new UUID will be created.
Note  
*•    Most existing drawings currently do not have a UUID. When opening these drawings in Planon now, these drawings will automatically get a UUID and their settings are converted to the new UUID based settings.
•    You can save the drawing preferences as default (CAD Integrator menu), but note that there is only one default setting. (In contrast, all individual settings of the user are saved).
•    The viewer stores the history of text point changes. Use CTRL+Z to go back or CTRL-Y to go forward. (History is only available during the open viewer session.)