How to "Edit" formula Composition

One of the common improvement suggestions I have received is to allow users to edit formula compositions, especially for BM based formulations. Thus in this app you can only modify compositions of "BM based" formulas or Custom formulas.

Here is how:

In the formula composition screen, there will be an "Edit" button in right upper corner 

for formulas that you can edit composition of.

Touch the edit button and the screen will change to one below

Touch inside any field and using the keyboard which pops-up 

make desired change to the composition.

Then touch the "Done" button and changes will be saved.

That's it.