That depends on what document and what changes. Please ask this question again using words that make it clear what you what to know.
A smaller version of a document is called a portable document. This will allow small changes to be made to the document without changing the entire document.
A smaller version of a document is called a portable document. This will allow small changes to be made to the document without changing the entire document.
all physical changes are alike in which all of them changing without changing in chemical makeup of the matter we have
When you do a save, the changes are applied to the document you originally opened. When you do a 'save as', you have to choose a name and a location where a copy of the document will be saved; this copy will have changes you are currently making to the document. You can then exit the document without saving, and your original document is unchanged. The copy that you 'save as' is still intact, with changes. You can also do a 'save as' without making any changes, just to have another copy of the document existing with a new name and/or location.
Matter can undergo physical changes without changing its identity. Physical changes include melting or freezing; evaporating or condensing; changing shape; chopping or grinding into smaller pieces.
a president changing policy without consulting Congress
no
These are physical changes.
Sublimation
Iodine I2
changes from one state to another without a change in chemical composition
Water and Ice.