Learn Spanish (Latin America): Haz el gesto, quiero verlo.

Haz is the irregular affirmative tú (informal 'you') command for hacer (to make/do). Most verbs form this command using their normal él/ella present tense form, but hacer is one of the eight verbs that have a special, shortened command form.

Why is lo attached to the end of ver?

When you use an infinitive verb (a verb in its basic form ending in -ar, -er, or -ir, like ver), object pronouns like lo (it) must be attached directly to the end. This merges them into a single word: verlo (to see it).

What does the lo in verlo refer to here?

It stands for 'it' and refers back to el gesto (the gesture). Because gesto is a masculine singular noun, we use the matching masculine singular pronoun lo.

Does hacer mean 'to do' or 'to make'?

It means both! Spanish uses hacer for both 'doing' an action and 'making' a thing. In this sentence, haz el gesto translates smoothly to 'make the gesture' or 'do the gesture' depending on what feels most natural in English.