This block is available for placement on the main dashboard or it can be used in automessages.
The block will show the 5 most recent posts for a user (based on their role and if they're "invited" to the post.
You can edit this block by hovering over the block with your mouse, and clicking the gear wheel in the upper right hand corner - click on "configure block".
If you want to show more items (posts) in the block, I would suggest showing just the teasers as several full posts can take up a lot of space on the dashboard.
Please note that these settings will apply to any place this block is used - there's on;y one settings page for the block, even if you are using it in a few different places.
You do not need to worry about adjusting the regional or visibility settings.
Remember to save your changes.