Since The tempo view already captures T for "Tempo Properties" it may be easier to go into Preferences > Customizations > Keyboard Shortcut, search for HUD in the Global Area and bind "Global Tools HUD" to a different key.
 
It should not be necessary to create a custom binding for this. I am guessing T for "Tempo Properties" is a shortcut from Pre-X days which needs to be remapped and/or the Wheel+Click needs to be added for this view.

For those playing along, I believe the problem is accessing HUD not the smart tool. There is only one smart tool, the star icon in the HUD. It does appear that HUD access is broken in the Tempo view.

scook
For those playing along, I believe the problem is accessing HUD not the smart tool. There is only one smart tool, the star icon in the HUD. It does appear that HUD access is broken in the Tempo view.

So if I understand correctly, the Smart Tool is not available in the Tempo View, (which makes sense, I guess).  The 'Tempo View' Tool Bar is no longer present and so the HUD, (or some sort of access to the various editing tools) should be available and is not.  My solution was to select tools from the main menu.
 
Is that about it?
 

The Smart Tool is available, it is the first tool in the HUD. I would think the HUD should be easier to access in the Tempo view but the current shortcuts do not work. The current shortcuts are

• T - which is taken over by a hardwired call to "Tempo Properties" and
• Wheel+Click - which does not appear to be active in the view

 
Currently to access the HUD while working in the Tempo view

• Use the Control Bar module or
• Add a custom shortcut in Preferences to "Global Tools HUD" in the Global Area

I do not believe this is by design but the result of changes over time. If you want the current HUD shortcuts active in the Tempo view, I would recommend filing a Problem Report adding the CWBRN to the subject of the first post (I would also modify the subject to something like "[CWBRNnnnnn] - Unable to Access HUD in Tempo view")  and this will get moved to the Problem Reports forum.

It is also possible to change tools with F5 through F10.