Mojave Photos will not allow me to rearrange the sequence of photos within events .
since updating to Mojave Photos will not allow me to rearrange the sequence of photos within events . When the sort option under 'View" is selected the options are greyed out. The only option within the greyed out area is ' Keep by date'. How do I change this. I want to be able to move any photo to any position within the collection.
MacBook Pro 13", 10.14