Obsidian is a simple high contrast theme with eight extra block positions.
The block positions above and below the main content expand to fill the space when there are less than three blocks.
=Block Positions=
+--------------------------------------------------------------------------------------------------+
|                                                                                                  |
|+---------------------+ +---------------------+ +---------------------+ +------------------------+|
||                     | |                     | |                     | |                        ||
||      Top Left       | |      Top Center     | |       Top Right     | |                        ||
||       (new)         | |        (new)        | |         (new)       | |        Side Top        ||
|+---------------------+ +---------------------+ +---------------------+ |         (new)          ||
|+---------------------------------------------------------------------+ +------------------------+|
||                                                                     | +-----------++-----------+|
||                                                                     | |           ||           ||
||                                                                     | |           ||           ||
||                                                                     | |           ||           ||
||                             Main Content                            | |           ||           ||
||                                                                     | |           ||           ||
||                                                                     | |           ||           ||
||                                                                     | | Side Pre  || Side Post ||
||                                                                     | |(standard) ||(standard) ||
||                                                                     | |           ||           ||
||                                                                     | |           ||           ||
||                                                                     | |           ||           ||
||                                                                     | |           ||           ||
||                                                                     | +-----------++-----------+|
|+---------------------------------------------------------------------+ +-----------++-----------+|
|+---------------------+ +---------------------+ +---------------------+ |                        ||
||                     | |                     | |                     | |                        ||
||    Bottom Left      | |    Bottom Center    | |      Bottom Right   | |      Side Bottom       ||
||       (new)         | |        (new)        | |         (new)       | |         (new)          ||
|+---------------------+ +---------------------+ +---------------------+ +------------------------+|
+--------------------------------------------------------------------------------------------------+