Click on the virama, called halant in Sanskrit (diacritic in the center) to delete the inherent vowel a: it's necessary to add the virama two consonants.

example: vedānta is written by clicking on the keys: va + e + da + ā + na + virama + ta

To type directly with the computer keyboard:

• Use the capital to type letters subscribed with a dot below: T, Th, D, Dh, N, L, S
• Type G for ng & J for ñ
• Type z or ç or sh for ś
• Type aa, ii, uu (or A, I, U) for the long vowels ā, ī, ū
• Type -r and -ri for ri and rī
• Type -l and -li for li and lī
• Type M for ◌ं (anusvara) & MM for ◌ँ (candra bindu)
• Type H for ◌ः (visarga)
• Type = for ◌़ (nukta) : dot below
• Type _ for ◌॒ (anudātta), twice for ◌॑ (udātta), three times for ◌᳚ (svarita)
• Type / or | for । (danda)
• Type ' (apostrophe) for ऽ (avagraha)
• Type O, OM (capitals) for ॐ
• Type x (unicode 200D, zwj, zero width joiner) to form a half consonant; example: type sx for स्‍
• Type xx (unicode 200C, zwnj, zero width non-joiner) to prevent conjunct forms; example: type kxxS for क्‌ष्

Download & install the font Siddhanta