If you patched the content version, the originator is the same, so in the Version column, select the new version number.
If you forked the content version, the originator is new, so click New and select the originator and version you just created. Give it the highest priority and click OK.
Click Save.
Activate managed schema, if applicable.
Select Portal Configuration > Developer Options.
Click Enable Portal for Development.
Specify this content version as the editable originator, specify a default feature, and click Save.
Note: If this is the only enabled-for-development content version activated for the portal and it is at the highest priority, it is specified automatically.