PreserveImageOptions is an option to graphics and related functions that specifies whether image size and certain other options should be preserved from the previous version ...
RawBoxes[boxes] is a low-level construct which is formatted as boxes without further interpretation.
RefreshRate is an option to Animate and related functions which specifies the refresh rate for frames in animations.
Saveable is an option for notebooks that specifies whether a notebook can be saved.
SaveAutoDelete is an option for ErrorBox objects that specifies whether the ErrorBox is automatically deleted when the notebook containing it is saved.
Scrollbars is an option for Pane that specifies whether scrollbars should be displayed.
ScrollingOptions -> {opt_1 -> val_1, opt_2 -> val_2, ...} is an option for notebooks that specifies settings for scrolling.
While
(Built-in Mathematica Symbol) While[test, body] evaluates test, then body, repetitively, until test first fails to give True.
$DynamicEvaluation is a symbol whose value is True if it is evaluated as part of the evaluation of a Dynamic.
$Epilog
(Built-in Mathematica Symbol) $Epilog is a symbol whose value, if any, is evaluated when a dialog or a Mathematica session is terminated.