dotall: vs multiline: ?

[NotNull]

What are the differences between dotall:regex:content:... and multiline:regex:content:

Or formulated different : in what situation should I use the one or the other?

[void]

dotall:

When enabled, regular expression . will match all characters.
When disabled, regular expression . will match all characters except new lines.



multiline:

When enabled, ^ and $ will match the whole line.
When disabled, ^ and $ will match the entire text.



eachline:

Match each line or match the entire content.
If enabled, searching stops on the first line matched.



dotall:
multiline:
eachline:

[NotNull]

All clear now. Didn't connect the dot to "." in dotall: ...
(language barrier)