The Main Toolbar contains the most commonly used features. For ease of use, the toolbar buttons have been grouped by related functions (from left to right).

Edit (Cut, Copy, Paste) - Also available as keyboard shortcuts
Undo, Redo - Also available as keyboard shortcuts
Filter
Share & Export (PDF, JPEG, PNG formats) Buttons
My Profile
My Profile opens a pop-up window to change your password and personal details.
Comments
Pdf export
pdf export is not really a pdf (vectorized), is a jpg inside a pdf. If you zoom, you can see the pixels!!!!!!!!!!!!!!
Zoom
Does 100% zoom = what will "print" on a Full page?
How can one know if the "canvas" is more / less than a full page?
RE:Zoom
You can refer to the Create New Diagram Help page. You can define the page size (A4, etc) when creating a new diagram.