AbsoluteOptions
AbsoluteOptions[expr]
gives the absolute settings of options specified in an expression such as a graphics object.
AbsoluteOptions[expr,name]
gives the absolute setting for the option name.
AbsoluteOptions[expr,{name1,name2,…}]
gives a list of the absolute settings for the options namei.
AbsoluteOptions[object]
gives the absolute settings for options associated with an external object such as a NotebookObject.
Details

- AbsoluteOptions gives the actual settings for options used internally by the Wolfram Language when the setting given is Automatic or All.
- AbsoluteOptions returns lists of rules, just like Options.
- You can use AbsoluteOptions on graphics options such as PlotRange and Ticks.
- If object is a front end object such as $FrontEnd, NotebookObject, or CellObject, the kernel will send a request to the front end to find the result.
- Front end objects with Dynamic option values will resolve the dynamics to their effective values.
Examples
Text
Wolfram Research (1999), AbsoluteOptions, Wolfram Language function, https://reference.wolfram.com/language/ref/AbsoluteOptions.html (updated 2017).
CMS
Wolfram Language. 1999. "AbsoluteOptions." Wolfram Language & System Documentation Center. Wolfram Research. Last Modified 2017. https://reference.wolfram.com/language/ref/AbsoluteOptions.html.
APA
Wolfram Language. (1999). AbsoluteOptions. Wolfram Language & System Documentation Center. Retrieved from https://reference.wolfram.com/language/ref/AbsoluteOptions.html