what are the steps for selecting theme and theme colour before presentation.
Answers
Answer:
To select new theme colors:
If you don't like the colors of a particular theme, it's easy to apply new theme colors; everything else about the theme will remain unchanged.
From the Design tab, click the drop-down arrow in the Variants group.

Select Colors, then hover the mouse over the different theme colors to see a live preview.
Select the desired theme colors.

The presentation will update to show the new theme colors.
To customize theme colors:
Sometimes you might not like every color included in a set of theme colors. It's easy to change some or all of the colors to suit your needs.
From the Design tab, click the drop-down arrow in the Variants group.
Select Colors, then click Customize Colors.

A dialog box will appear with the 12 current theme colors. To edit a color, click the drop-down arrow and select a different color. You may need to click More Colors to find the exact color you want.

In the Name: field, type the desired name for the theme colors, then click Save.

The presentation will update to show the new custom theme colors.
With some presentations, you may not notice a significant difference when changing the theme colors. For example, a textured background will not change when theme colors are changed. When trying different theme colors, it's best to select a slide that uses several colors to see how the new theme colors will affect your presentation.
To select new theme fonts:
It's easy to apply a new set of theme fonts without changing a theme's overall look. The built-in theme fonts are designed to work well together, which can help to unify your presentation.
From the Design tab, click the drop-down arrow in the Variants group.

Select Fonts, then hover the mouse over the different theme fonts to see a live preview.
Select the desired theme fonts.

The presentation will update to show the new theme fonts.
To customize theme fonts:
If you have specific fonts in mind for a presentation, it's easy to choose your own theme fonts.
From the Design tab, click the drop-down arrow in the Variants group.
Select Fonts, then click Customize Fonts.

A dialog box will appear with the two current theme fonts. To change the fonts, click the drop-down arrows and select the desired fonts.
In the Name: field, type the desired name for the theme fonts, then click Save.

The presentation will update to show the new custom theme fonts.
Changing the theme fonts will not necessarily update all text in your presentation. Only text using thecurrent theme fonts will update when you change the theme fonts.