Would be really useful indeed to be able to do that. Please Hubspot 
Almost two years since the original request… I would love to be able to customize this by default for the whole team
+1
I need this
+1! This is really needed!
i would also like to change the right sidebar - is the research done?
It’s so helpful to be able to customize so many of the records. It doesn’t make sense that the right sidebar cannot be customized like the others. Please add this functionality. Thak you.
Great idea and absolutely essential for all HubSpot users. Salesforce CRM, Active Campaign and Zendesk all provide similar features, easy viewing of all quotes associated with contact at contact level instead of having to dive into multiple levels to find what quotes are associated to different contacts!
Its about time Hubspot starts valuing the feedback and ideas submitted from Hubspot community 
Defintely needed!
+1
I’m surprised that it’s not a feature. I don’t know why we can customize the left sidebar but we are not able to even hide a section which is not supported in our current plan.
Yes, we really need to have this customisation added.
+1 Please enable this!
Hi Everyone,
Thank you all for the feedback here! I am excited to announce that we will be opening up a small beta later this month which enables you to customize your right sidebar. If you are interested in participating in the beta, please fill out this form so we can get in touch.
Thanks!
Lily
Agreed with everything said here! One client just moved to Service Hub Enterprise and it is painful to help users deal with all the sections on the right that don’t apply to them.
Hey @LRosenbloom, is the beta closed?
Tried to fill in the form but it says it doesnt accept any answers anymore.
LRosenbloom We do need this Beta version please!
@LRosenbloom Is this available now, or can my company participate in the beta? Thanks!
Please let us know when this feature is available or the beta is opened again.
Clients complain about this on a regular basis ---please consider this removal.
Anychance we can get on the beta?!
Would love to be a apart of it.