As of April 2022 you can edit your custom block directly through the page it is on, rather than having to find it in the Custom Block Library.  When you are logged in, click the pencil icon at the top right corner of the block. Note that each page also has a pencil icon, it will be the first icon you see at the top right, directly above the icon of the custom block. The screenshot to the right shows the icon for the page with the icon for a custom block at the top of the page.  Don't be confused if you click the top one and are taken to edit the page.  Click on the 2^nd icon to get to your custom block.

Changes you can make in View Mode

• Edits to the page itself by clicking on the top pencil icon (same as clicking on the Edit tab)
• Edits to custom blocks by clicking on the block's pencil icon
• Watch a video tutorial on making changes in View Mode
   

Changes you can make in Layout Mode

• Configure a custom block (apply different View Modes, hide or show the title of the block)
• Changes to the layout itself:
  • Add or delete sections
  • Move or delete a custom block on the page
  • Configure sections (column widths, margins and padding of the grid, CSS classes like color gradients and equalheight for multi-column sections)
  • Learn more about Layout Builder
  • Watch a tutorial on our Videos page
     

Changes you can make in Edit Mode

• Edits to the content on the basic page itself (learn more about editing basic pages)
• Changes to the page's location in the top navigation (add it to the menu, subtract it from the menu, change its location in the menu, etc.)
• Change the state of the page to published, draft, or archived
• Edits to items in the right panel (URL Alias, Content Keywords, etc.)