FileNameDrop["name", n] drops the first n path elements in the file name " name".FileNameDrop["name", -n] drops the last n path elements in the file name " ...
FrameMargins is an option for objects that can be displayed with frames which specifies the absolute margins in printer's points to leave inside the frame.
FresnelC[z] gives the Fresnel integral C(z).
FresnelS[z] gives the Fresnel integral S(z).
General
(Built-in Mathematica Symbol) General is a symbol to which general system messages are attached.
GeoPositionENU[{east, north, up}, p] represents a point with local Cartesian coordinates {east, north, up} in a reference system specified by the position p.
HelpBrowserSettings -> {opt_1 -> val_1, opt_2 -> val_2, ...} is a global option that specifies settings for the legacy Help Browser.
HoldRest is an attribute which specifies that all but the first argument to a function are to be maintained in an unevaluated form.
ImageAlign[image_1, image_2] returns a version of image_2 that is aligned with image_1.
ImageResolution is an option for Export, Rasterize, and related functions that specifies at what resolution bitmap images should be rendered.