Note: SAML SSO is only available on our Business and Enterprise plans. You must be an admin to enable SAML SSO
If you use another SAML Identity Provider that isn't in our provider list, we should still be able to support it.
First, go to Workspace settings, which you'll find under your workspace name in the top left corner:

Then, enable SAML SSO. - Once SAML SSO is enabled:
metadata.xml in the “SAML Metadata XML” field
If this gives you any trouble at all, please contact us or reach out in Whimsical under the question mark in the bottom right corner.