To enable members to customize their own homepages/dashboards,
- Go to Manage > Administration
- Click the search box in the upper-left corner of the window, search for "Users" and select the item "Users" from the "Extensions" list.
- On Users > Options, check Allow user-customization of the site home page.
- Click Save.
Now, all signed in members of the community will have an option to edit the homepage/dashboard of the community for themselves.