CRM Lead Send Mail no longer opens a moveable email composition window

CRM Lead Send Mail no longer opens a moveable email composition window

Recent changes to CRM have caused the Lead 'Send Mail' option to just open a static window which covers all the Leads details.  It used to open a new moveable window so you could compose the email while easily viewing all the Lead details.  Now you have to open a separate browser tab, open the Lead details in that and swap between the tabs to compose the email, which is less efficient and a bit messy.  Any chance we can have the Send Mail option open a new moveable email composition window again as it used to?

Thank you