I agree, I can’t see the benefit too but I hope the OP will clarify why this is a good thing.
:-)

marking the current word and the next 2 occurrences in different color

It can be done, but is there value in that? Not sure I’m following what the OP’s true end-goal is, and how something like that helps.

It would be impossible that your script Implement the function of my request.

That’s not exactly true.
It is true that Notepad++ does not provide such a function,
but that doesn’t mean that we can’t create it with a python script.
For example, putting the cursor into a word (no selection) and running this script
would result in marking the current word and the next 2 occurrences in different color.
Using style1, 2 and 3.

def find():
    current_pos = editor.getCurrentPos()
    start = editor.wordStartPosition(current_pos, True)
    end = editor.wordEndPosition(current_pos, True)
    text = editor.getTextRange(start, end)
    document_end_pos = editor.getTextLength()
    while start:
        yield start, end
        pos = editor.findText(0, end, document_end_pos, text)
        if pos is None:
            break
        start, end = pos
    

_find = find()
number_of_matches = 3
try:
    for i in range(number_of_matches ):
        start, end = next(_find)
        editor.setIndicatorCurrent(21+i)
        editor.indicatorFillRange(start, end-start)
except StopIteration:
    pass

With your example of below text, I intend to highlight letter ‘a’ in between “Just” and “sample” in blue color, and to highlight letter ‘a’ in between “of” and “like” in green color.

Just a sample text with a couple of a like in apple

But As Alan Kilborn said, Notepad++ won’t support to highlight(mark) seperated word in respectively different color.So It would be impossible that your script Implement the function of my request.

I follow your advice(Search > Mark All > Using xxx Style) but it is impossible to highlight selected word in two color. For example, If I selected just letter ‘a’ from below word, It only highlight all of letter ‘a’ in different color. I want to highlight just two or three of letter ‘a’ from below word and it must be different color each to each.

The feature is called “Mark all”. Thus if you highlight a single a and invoke the feature, of course it will do all of the a present.

Regarding “two color”, what I meant was, if you first color with, say Style1 and then you color the same thing with Style2, what will result will be a color combination of the colors of Style1 and Style2.

Is there still remaining confusion? I think the answer is that you can’t do what you are trying to do.

if there is any mark which is created by Mark All command(Search > Mark All > Using xxx Style),your plugin cannot remove them…

You are correct, would you mind specifying how exactly you want it to behave?
If you just want to have a single script which clears every possible mark indicator
we could change it like so

INDICATORS = [21, 22, 23, 24, 25, 31]
for i in range(editor.getSelections()):
    start = editor.getSelectionNStart(i)
    end = editor.wordEndPosition(start, True)
    for indicator in INDICATORS:
        editor.setIndicatorCurrent(indicator)
        editor.indicatorClearRange(start, end-start)

but if you want to have a different behavior just let me know.

I want to highlight just two or three of letter ‘a’ from below word and it must be different color each to each

Sorry, but still confused about this.
Let’s assume you have a text like this

Just a sample text with a couple of a like in apple

Now if you select the a in between Just and sample,
you want to have automatically selected
a from sample,
a before couple,
a before like
and a in apple
and each of them in different color?
Or something else?

@Alan-Kilborn
I follow your advice(Search > Mark All > Using xxx Style) but it is impossible to highlight selected word in two color. For example, If I selected just letter ‘a’ from below word, It only highlight all of letter ‘a’ in different color. I want to highlight just two or three of letter ‘a’ from below word and it must be different color each to each.

aaaaaaaaaaaaaaaaaaaaaaaaaa
aaaaaaaaaaaaaaaaaaaa
ssssssssssssss

@Ekopalypse
Thank you very much for your wonderful plugin,It really remove any mark which I selected.But if there is any mark which is created by Mark All command(Search > Mark All > Using xxx Style),your plugin cannot remove them…

maybe more accurately, I overcomplicate it from the beginning…

LOL :_D - A good advise which I should have known by yesterday - wink, wink

Yea, I often don’t do things because I see the complications right from the beginning. Or maybe more accurately, I overcomplicate it from the beginning… :)

user marks with a regular expression

that what made me holding back at first glance as well but then I thought, at least
a possible workaround even if it doesn’t fit into every possible unmark wish.
Let’s see what OP is thinking about it. :-)

I was thinking of a Pythonscript, too, but then I thought what if a user marks with a regular expression…how to tell the script the regex to unmark. It gets complicated. I like yours, unmarking possible only for simple, selectable text…

concerning your first request of deleting existing marks resulted from mark dialog,
if you don’t mind to install pythonscript plugin you might be able to get around this limitation by using a script like this

FIND_MARK_INDICATOR = 31
for i in range(editor.getSelections()):
    start = editor.getSelectionNStart(i)
    end = editor.wordEndPosition(start, True)
    editor.setIndicatorCurrent(FIND_MARK_INDICATOR)
    editor.indicatorClearRange(start, end-start)

You would either double click the word or select the whole word and run the script
to clear the marks. Works with multiedit setting as well.

Then,Would you recommend any editor of notepad++ alternative

Nope. :)

can’t highlight any word with two or three colors

Well, you can do this with Search > Mark All > Using xxx Style multiple times, but you can’t partially undo it later (in relation to your first original question).

Then,Would you recommend any editor of notepad++ alternative which enable me to highlight Non-Contiguous word(seperated word) in two or three colors?

this is a very good and nicely paradoxic question. i like. 👍

i suppose that most users at the notepad++ community are mainly notepad++ users, and most people that have found a more suitable editor, will hang around at the community forum of their respective new editor, hence not visiting the notepad++ community.
so even if they know which one would be best, they probably could not answer this question, due to their absence at this platform.

so the big question is how can anyone find the most suitable editor for all own personal needs, without trying out all of them ?

Currently there is no way to “unmark” partially. As you noticed it is an all or nothing clearing of marking.

Regarding your second question, I for one am not following what you are asking about.