Visual Studio gives many navigation hotkeys: F8 for next item in current panel (search results, errors ...), Control+K, N for bookmar
I don't think theres an explict next-frame / prev-frame key binding but heres what I do.
CTRL-ALT-C is already bound to "Debug.CallStack" This will focus you in the Call Stack Tool Window
Once focused in the Callstack window... Up & Down arrows will move you through the call stack frames
I've then bound
CTRL-C, CTRL-S to "DebuggerContextMenus.CallStackWindow.SwitchToFrame" and CTRL-C, CTRL-C to "DebuggerContextMenus.CallStackWindow.SwitchToCode"
both of which will take you back into the code window at the particular frame.
Hope that helps.