Hi Morris,
You can't see both at the same time. You can either display everything in it's assigned currency, or everything adjusted to your specified default currency. You do this with "View / Exchange Rate Adjusted". So, make sure your USD holdings are being entered in USD, and assigned to USD. I assume you have CAD set as your default currency, and all your CAD investments are being recorded in CAD. You can then turn off "View / Exchange Rate Adjusted", and all your CAD investments will display in CAD, and all your USD investments will display in USD. If you turn on "View / Exchange Rate Adjusted", everything will display in CAD.
In case you haven't seen it, we have a tutorial on using multiple currencies with Fund Manager here:
https://www.fundmanagersoftware.com/tut ... video.html