This tutorial shows how to manage number of posts displayed in block inserted via view in Drupal 7.x.
In order to change number of posts displayed in block inserted via view, you should perform the following:
Log into Drupal administration panel;
Select the block you want to edit on the front end. Using settings icon click Edit view:
Under Block settings-Pager section set the number of items displayed;
Under Format section select Settings in order to manage the number of items displayed in a row:
In Class attribute field change the grid number in order to fit the desired items in a row:
Feel free to check the detailed video tutorial below: