There are a number of functions built into the Wolfram Language which, like Plot, have various options you can set. The Wolfram Language provides some general mechanisms for handling such options.
If you do not give a specific setting for an option to a function like Plot, then the Wolfram Language will automatically use a default value for the option. The function Options[function,option] allows you to find out the default value for a particular option. You can reset the default using SetOptions[function,option->value]. Note that if you do this, the default value you have given will stay until you explicitly change it.
|Options[function]||give a list of the current default settings for all options|
|Options[function,option]||give the default setting for a particular option|
|Options[plot]||show all the options used for a particular plot|
|Options[plot,option]||show the setting for a specific option|
|AbsoluteOptions[plot,option]||show the absolute form used for a specific option, even if the setting for the option is Automatic or All|
While it is often convenient to use a variable to represent a graphic as in the above examples, the graphic itself can be evaluated directly. The typical ways to do this in the notebook interface are to copy and paste the graphic or to simply begin typing in the graphical output cell, at which point the output cell will be converted into a new input cell.
When a plot created with no explicit ImageSize is placed into an input cell, it will automatically shrink to more easily accommodate input.