The theme offers control over your Sidebar layouts by setting it with either globally(Site-Wide/Global) or page-specific(Page-Level). If you want to have a uniform sidebar layout for all your pages then you should head on to
Morphis Theme Options > Global Posts Settings > Sidebar Layout to set your layout to use either of the three: Right Sidebar, Left Sidebar or Full Width w/ No Sidebar. This will be applied to all your pages. However, if you want to have different sidebar layouts for some of your other pages, then just choose the layout from the Sidebar Layout option under the “Add New/Edit” Post of your particular post you want.