[Grace Themes]

Hi,

1. To remove the sidebar from pages
– Edit the page and select “Full Width” Page Template from Page Attribute panel

2. To remove the sidebar from posts
– Go to the Appearance -> Theme Options -> Basic Settings -> Blog Single Layout -> Select Blog Single Full Width

Please check the documentation
https://www.gracethemes.com/documentation/charity-help-doc/#page-templates

Regards
Grace Themes