Questions & Answers about Ako želiš bolju sliku, podesi svjetlinu.
Why is ako used here instead of da for "if"?
In Croatian, ako is used for real or possible conditions in the present or future, like wanting a better picture right now. You use da for unreal or hypothetical conditions, usually with the conditional mood, such as da želiš meaning "if you wanted (but you don't)".
The command "adjust" is podesi. Why use the perfective aspect here rather than the imperfective?
You use the perfective podesi because the focus is on completing the action successfully: you adjust the brightness once to get the desired result. If you used the imperfective podešavaj, it would imply a continuous or repeated tweaking process, like "keep adjusting".
How does the noun svjetlinu relate to the adjective for "bright" (svijetao)?
The noun svjetlina (here in the accusative case as svjetlinu) is built from the root of svijetao. Notice how the long ije in the adjective shortens to je in the noun. This vowel shortening is a classic pattern in Croatian when adding suffixes to create abstract nouns.
Why does the word for "better" (bolju) take the -u ending here?