Adjust your modules list:
Settings - General - Modules - "Edit" icon near module name:
Here you can change the labels, icons, order, user access or visibility of existing modules: click "Edit" icon near the module.
Add custom module:
Settings - General - Modules - Add module:
Label - input
Icon - select
Active - check
Type:
Embedded html - for links like that <iframe frameborder="0" style="width:100%;height:890px;" src="https://viewer.diagrams.net/?tags=%7B%7D#G6Yq"></iframe>
External content - for links like that "https://linkexample.com"
Opening: we recommend to select "Internal". If your embedded link doesn't support this type of opening, then please, change to "New tab" or "New window".
Redirect type is design to fast opening internal app pages, like "https://app.strategyoverview.com/settings".