When you paste a text with your Mac, using the shortcut with the mouse, or with Command + V, you will have noticed that, on many occasions, the style or format of the same is completely changed, since all the data such as the font or the size of the letter are eliminated, and the predefined one of the application you are using in question appears.
However, it is quite likely that, even if only on certain occasions, you do not want this to be the case, and you prefer that everything be copied as it was in the other place, but you should not worry, since you will only need to use a simple key combination to achieve it.
So you can use the "Paste with the same style" function in macOS
As we mentioned, although by default on Mac, except in exceptional cases of some text editors mainly, when pasting a certain text, the style of the new document itself is adapted, since what it does is copy only the characters written in question, but with just a keyboard shortcut you can modify this.
To do this, you just need to copy a text as usual, by clicking with the left button of your mouse, or by pressing Command + C And, once this is done, when you want to paste it into the other application, what you should do is, instead of pressing Command + V, it is press Command + Option (Alt) + Shift + V at the same time.
When you use this shortcut in supported applications, such as the default Notes on Mac, or any other text editor, you will be able to appreciate how the text is pasted but the style of it is also maintained, which may vary somewhat depending on whether it is from a web page or a document, but in general it will work for you. However, it should be noted that, for example, Markdown editors do not generally work with this, so it is something that you must take into account when using it.