Hello all!
 
I have a track I recorded that has a pop/click that I can zoom into and see the amplitude, but I'm not sure how to select just that part of the waveform so I can delete it or insert "silence" into that are of the track.
 
On old software like "Cool Edit", it was simple to just select a particular area of the waveform and either delete it or insert silence.
I've searched through the Sonar Documentation but can't see to find a solution
 
Is there an easy way to do this in Sonar Platinum without affecting the rest of the track?
This is something that I've been trying to figure out for what seems to be forever.
 

I do that with Goldwave (audio editor).  Its probably possible with Sonar, and I should know how to do it, but just easier for me with Goldwave.   Goldwave has pop/click filters and if that doesn't do it I can manually delete or null out the pop or click.
 

I also use Gold Wave or Wave Lab for these sort of things. You can open any Sonar audio track in those programs by adding the editor to the tool menu. Scook made a tool to do this 
http://forum.cakewalk.com/Adding-programs-to-the-SONAR-Utilities-Menu-a-new-tool-Updated-to-v23-m3237117.aspx
 
But if you zoom in on the glitch,, drag and highlight, then open the Process/ Audio effects and use the Gain tool that works fine too. 

I have pops on drum tracks sometimes when we record a concert or rehearsal.

For kick, snare and toms ( on separate tracks) my workflow is to simply magnify the click/pop then cut and delete it. I then copy/insert a correct note.

Cheers,
Jerry

Select the track -Zoom in close to the section - place the cursor just before the pop transient - Press the S key to split. Place the cursor just after the pop transient - Press S key again. Select the small clip that is created around the transient - now it can be deleted or muted by hitting the Q key. You can apply process gain to reduce its volume - you can apply a fade  etc.
 
When you finished the edit, I suggest you dbl click the track name to select all of the clips in the track and then pull down the clips tab and bounce to clips to create a single wave file of the track. There is separate wave file created for each clip so bouncing to clips keeps the programs file handling chores to a minimum.

I like to use a wave editor such as Magix Sound Forge Pro (or, the less expensive STUDIO version), and zoom in and simply redraw the offending spike (pop or click) to match the adjacent waveform. This way, there is no deletion or hole to contend with and is virtually inaudible.

I sometimes use track automation and automate the Quadcurve EQ to either bring up the HP filter for a thump, bring down the LP filter for a click, or put a notch in for a pop.
 
This avoids having a gap in the audio, and if there's good information in the track, I don't lose it.

Select mute tool and click/drag over the offending area?

If I have spikes in recordings, and I want to edit the underlying .wav I go to Audacity (which is free) where you can edit it very high magnification, but normally I stay in Sonar and use the clip gain envelope at high magnification to reduce the gain precisely around the spike.  I generally prefer to perform non-destructive edits in my recording files, because I export the stems to mix/master in a new file, that way I know that if I need to I can always go back to the original take...

To the OP. CbB has all the tools you need for editing of wave files. It takes a bit of learning how to use the software - like any other. With the exception of re- drawing a waveform, there's nothing that can't be done directly in CbB.