By default the hamburger menu in the top left is enabled on the desktop client (Figure 1):
Figure 1 Hamburger Menu
When enabled, parts of the Symphony desktop client window cannot be resized.
To disable the hamburger menu to allow resizing, click on the hamburger menu, then Window and then Disable Hamburger menu (Figure 2):
Figure 2 Disable Hamburger Menu
Once selected, you will be prompted to relaunch Symphony for the change to take effect (Figure 3):
Figure 3 Relaunch
Note: Once relaunched, you must re-login to Symphony. At this point, cancelling out of this change is also available.
You will now be able to resize the Symphony window as you wish.
To re-enable the hamburger menu, click on the Symphony desktop client and press the Alt key. The Hamburger menu will reappear in the top left with the option to Enable Hamburger menu (Figure 4):
Figure 4 Enabled Hamburger Menu