Moodle has a limit on the size of file you can load. This page explains why this is, offers alternatives and tells you how to change it.

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To add a block to the dock

• Next to the heading on each block is an icon to Hide it and next to that an icon to "dock" it (Indicated in the diagram below for the Settings block).
  

This moves the block to a tab on the side which looks like this:

• If you mouseover the docked tab you can use the block as normal

To undock the block

• Click the icon for Undock (as shown below)