Questions & Answers about Ajusto la pantalla, de modo que es cómoda para mis ojos.
Why does this sentence use the indicative es instead of the subjunctive sea after de modo que?
De modo que can introduce a consequence (a factual result) or a purpose (an intended goal). When it describes a real, existing result, you use the indicative (es). Here, the speaker is stating it as a fact: as a result of the adjustment, the screen is currently comfortable. If it were an intended goal or hypothetical ('I adjust it so that it might be comfortable'), you would use the subjunctive (sea).
Could I use de manera que instead of de modo que here?
Yes! De manera que and de modo que are completely interchangeable in this context. Both mean 'so' or 'in such a way that' and follow the exact same rules for choosing between the indicative and the subjunctive.
Why is the adjective cómoda feminine and singular when it is for mis ojos (masculine and plural)?
Just as a refresher, why do we use para instead of por in para mis ojos?
We use para here because it shows the recipient or destination of a benefit. In this case, your eyes are the recipient of the screen's comfort.