Courier is the standard font used in screenwriting because it is a monospaced font, meaning that each character takes up the same amount of space. This makes it easier to format the script and ensure that the dialogue and action are aligned properly.

12pt is the recommended font size for screenwriting because it is large enough to be easily readable, but not so large that it takes up too much space on the page.

1.5 line spacing is the standard line spacing used in screenwriting because it provides enough space between the lines to make the script easy to read, but not so much space that it wastes paper.

Character names in a screenplay should be formatted in Title Case, meaning that the first letter of each word is capitalized. This helps to distinguish the character's name from the dialogue and action.

Dialogue in a screenplay should be left-aligned. This helps to create a clean and easy-to-read script.

Action in a screenplay should be indented. This helps to distinguish it from the dialogue and character names.

Scene headings in a screenplay should be centered. This helps to make them stand out from the rest of the script.

Transitions in a screenplay should be centered. This helps to make them stand out from the rest of the script.

Parentheticals in a screenplay should be indented. This helps to distinguish them from the dialogue and action.

Synopses in a screenplay should be left-aligned. This helps to create a clean and easy-to-read script.

Treatments in a screenplay should be left-aligned. This helps to create a clean and easy-to-read script.

Pitches in a screenplay should be left-aligned. This helps to create a clean and easy-to-read script.

Loglines in a screenplay should be left-aligned. This helps to create a clean and easy-to-read script.

Character breakdowns in a screenplay should be left-aligned. This helps to create a clean and easy-to-read script.

Shot lists in a screenplay should be left-aligned. This helps to create a clean and easy-to-read script.