b.g. is used to describe anything occurring in the background or rear plane of the foreground action. Always use this term in lower case initials. For example: Jim kisses Sarah as the hot air baloon takes off in the b.g.

Backstory is the historical background information that the writer creates for a character. Important backstory should never be telegraphed or force fed; it should come out organically through conflict, humor, and/or believable exposition.

Writers will sometimes use the parenthetical (beat) to interrupt a line of dialogue. Always written in lower case, a (beat) suggests that the actor should pause a moment before continuing the scene.

A block page is a script page that is all action description. Visually, the page is dense - with very little white space - and at looks like a block of paragraphs. Screenwriters try to avoid these pages. They want the read to move quickly, and it is usually a mistake not to break up a lot of action description with a quick line of dialogue or new scene header location.