Styles in MS Word are formats that determine the appearance of the text in the document. There are some predefined styles in Word, like Normal, Title, Heading1, Subtitle, etc. These styles have a predefined font, size, color, etc. You can create your own style also.
Steps to Create a New Style
Step 1: Write the text/word on which the style is based (select fonts, size, color, etc, depending on your choice).

Step 2: Select the word and right-click.
Step 3: Now, from the small menu, click on the drop-down menu beside Styles or click Styles available at the end.

Step 4: Click on "Create a Style".

Step 5: Name your Style and Click OK.
Step 6: If you want to change anything before saving, click on Modify.

Steps to Modifying Styles
To Modify the style before saving:
Step 1: Click on Modify before saving the style.
Step 2: The Create New Style from Formatting dialog box appears.
Step 3: Make the required changes like name, style based on, alignment, size, font etc.
Step 4: Click OK.


Explanation: Pic 1 contains the previous formatting we made, in pic 2 we changed the style based on, color and alignment.
The changed style is:

Now if we will write any text based on this style then it will be written with the same color, alignment, and heading.
Step 5: To modify the already saved style, right-click on the style and select Modify.
