Pants adjustment

A few years ago, we travelled to Vietnam and I had some tailored pants made for me.
I am now able to fit into the pants, but they were baggy on the waist as well as wide in the leg. I don’t have time to make a new pair but the pants have a handy adjustment on the centre back waist that you can see below.
The pants look ok from the front.
From the back, there’s lots of room in the back leg, so until I’ll need to take some of the volume out of the back leg.
9 May update: Since making these pants, I’ve also realised that my front waist is lower than the pants. I think I’ll become an expert altering soon. Or, is a high waistline back in?