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By default the WordPress revisions system stores a record of each saved draft or published update. The default setting for `WP_POST_REVISIONS` is true which means all changes/edits to content are saved in the database forever. You might think this should be unlimited but as you can imagine this causes a lot of clutter and a huge potential issue if lots of edits are made to site that has been up for a long time or one that has many authors generating new posts and edits.
By default Pagely has opted to disable revisions unless they are needed by the user. To enabled Page Revisions you can simply add the following line to your wp-config.php file which is located in the root of the site files on a new line in the Custom Constant Definitions section.
define( 'WP_POST_REVISIONS', 3 );
NOTE: If you made changes before the setting was enabled you will not see any old changes you made. You will need to make edits and save a draft to see if the revisions are enabled. If you had stored revisions from a previous host they might show up after setting this.
If you are not familiar with sFTP access please read this article.