In order to manage Blog Sidebar in Magefan Blog Extension for Magento 2, please go to the 'Admin' panel > 'Stores' tab  > 'Configuration'  > 'Magefan Extensions'  > 'Blog' and find 'Sidebar' group.

Search  Form Widget

To configure the Search Form Widget expand the section you see bellow.

1. To enable the Search Form select 'Yes' or 'No' correspondingly in the 'Enabled' select box.

2. Set the 'Sort Order' to manage the position of the Widget on the StorefrontThe higher the number of the position, the lower it will be displayed on the Sidebar.

Categories Widget

1. To enable the Categories Widget select 'Yes' or 'No' correspondingly in the 'Enabled' select box.

2. If you enable the 'Display Number Of Posts', the a number of articles will be dispayed near the category link.

3. Set the 'Sort Order'.

Recent Posts Widget

1. To enable the Recent Posts Widget select 'Yes' or 'No' correspondingly in the 'Enabled' select box.

2. Set the number of posts you want to be displayed in the 'Post Number' field.

3. Set the 'Sort Order'.

Archive Widget

1. To enable Archive Widget select 'Yes' or 'No' correspondingly in the 'Enabled' select box.

2. Set the 'Sort Order'.

Tag Claud Widget

1. To enable the Tag Claud Widget select 'Yes' or 'No' correspondingly in the 'Enabled' select box.

2. Set the 'Sort Order'.

Rss Feed

1. To enable the Rss Feed Widget select 'Yes' or 'No' correspondingly in the 'Enabled' select box.

2. Set the 'Sort Order'.

3. Ented the 'Feed Title'.

Once you have finished with the Sidebar Configurations, press the 'Save Config' button.