I've created a KMyMoney database using one of the presets that gave me lots of Asset/Liability/Income/Expense accounts and categories - among other things, the account
Liability >> Loans >> Study Grant
and the category
Income >> Study Grant

I'm not quite sure, however, how to set up the corresponding transactions correctly for my specific case, which is: I receive a certain amount of money each month as Study Grant, half of which I will have to pay back after I've completed my studies (but there's no interest).

What I've done so far is set up the following two monthly scheduled transactions:

1.
Type: Deposit
Account: Assets >> Monetary Assets >> Checking Account
Category: Income >> Study Grant
Amount: x

2.
Type: Increase
Account: Liability >> Loans >> Study Grant
Category: Income >> Study Grant
Amount: x/2

Is this the correct way to handle such a situation, or can/should the "Split transaction" feature be used? If so, how?

You should have 1 transaction of money going into your checking account. Half of it coming from income, and half from the loan account.

Just to be sure, this is what you meant, right?:

• Type: Deposit
  Account: Assets >> Liquid Assets >> Checking Account
  Category: Split transaction
  
  • Income >> Study Grant: x/2
  • Liability >> Loans >> Study Grant: x/2
  Amount: x

It seems to work, my net worth forecast now increases by x/2 per month... I think I'm getting the hang of this...

One question though, out of interest:
If you're supposed to specify loans by setting up a transaction of the form

• Type: Deposit
  Account: Asset >> ...
  Category: Liability >> ...

then what does one need transactions of the form

• Type: Increase
  Account: Liability >> ...

for?
In general, do you always specify an Asset account in the "Account:" input field of a transaction?

As far as I know, the type Increase has to do with shares and investment accounts, which are not involved in this case.