I don’t know if this helps but I will give it a go! Try starting with a drop down menu tv first.
Create 2 chunks
chunk1
chunk2
create a Template Variable
name = tvSidebarChk
Input Type:drop down / checkbox
Input Option values: Chunk 1==[[$chunk1?]]||Chunk 1==[[$chunk2?]]
Edit your template and put this.
<div id="sidebar">[[*tvSidebarChk?]]</div>
When editing your documents - you can select which chunk you want to show on your template.
interesting! what does the ’?’ before the ’]]’ do ??