It is called justified alignment. You can not apply both right align and left align at the same time. The option you want is fully-justified alignment.
The default is left aligned. Most documents stay left aligned. More formal documents are justified. So it depends on the type of document you are creating.
The default format for text is left justified.
The paragraph will be equally aligned on both left and right sides .
Left aligned and not justified
justify justified text
Paragraph alignment refers to the positioning of text within a paragraph relative to the margins of a document. There are four main types of paragraph alignment: left-aligned, right-aligned, centered, and justified. Left-aligned text is aligned along the left margin, right-aligned text is aligned along the right margin, centered text is aligned in the center of the paragraph, and justified text is aligned along both the left and right margins. Each type of alignment serves a specific purpose in formatting and presenting written content.
If both the left and right margins of text fall even with the text, the text is said to be justified.
fully justified
It is not clear what this question means by the word "sign," but when text is aligned to the left margin the text is left justified.
Right justified means that the type in a paragraph is vertically aligned on the right side of the page or column. Most type is set left justified and is easier to read due to reading from left to right.
Left aligned and justified are commonly used, with centre alignment quite common, and right justified being the least used.