To generate half forms and ligatures, type the full form of a character followed by the Halant key. The half form will be used if there is another consonant after the Halant.
Note: The Halant key is the D key on Devanagari keyboards and the F key on Devanagari-QWERTY keyboards.
Example: To type "namaste", the key sequence on the Devanagari keyboard would be: V-C-M-D-L-S. After you type L, you will see the half form of the character SA.