Hi Lex

Thank you for posting in the Lucidchart community! You can adjust the scale of the page using the scale tool accessed by clicked the gear at the bottom left of the page. The measurement object's scale unfortunately cannot be changed currently but is only to be used as a point of reference. You can adjust the scaling of the page however you'd like to when you use the scale tool! For more information about the scale tool and measurement object please refer to this article in the Lucidchart help center.

In addition we're always looking for ways to improve Lucidchart and your feedback is the best way for us to do that. Would you mind adding the ability to change the scaling on the measurement tool to our Feature Request form? These ideas are passed on to our development team for their consideration. 

Please let me know if you have any other questions.