These are format guidelines for documents (Word), slides (Powerpoint), and webpages (HTML files).  

Specific Suggestions
Every document should have a title. Every slide in Powerpoint should have a title.  

• The title should be bold, centered, in a font size somewhat larger than the main text font. 
• Capitalize all of the first letters of significant words of the title. (Although it is not yet "standard format", your instructor capitalizes every first letter of every word in a title, a common practice in magazines and periodicals).
• Don't underline the title.

Sample Subheading
Directly above this text is an example of a subheading. A subheading provides very convenient organization of your thoughts in a manner that is very readable.

• For optional "subheadings", simply use bold with a phrase of text on one line only. Capitalize the first letters of words.
  
• Avoid using "&". Instead, substitute "and" for "&".
• Never use all capitalized letters for your phrases or sentences in documents or presentations.
• Always add a space between a "bullet" and your text.
• There is never a space before punctuation like a comma or a period. There is always a space after punctuation like a comma or a period.
• The word "Internet" is always capitalized.
• Try to use just one font, unless there is a special reason. 
• When copying the text of an online abstract, change any bold text to plain text.
• Use a caption beneath every significant image or photo. This is something your readers appreciate.
  
• The caption should be in a smaller plain font size that the main text.
  
• You may use a phrase (an incomplete sentence) as a caption. Add a period at the end.
  
• Center the caption text directly under the photo.
  
• Don't use !!! or ??? in a page or a slide. Just using one punctuation mark is fine.
  
• Use a consistent format: the same type of font, font size, font style, font color, and text placement on the page.

Spelling And Grammar
Always use complete sentences in narrative text. The first letter of a sentence should be capitalized. Every sentence should end with a period. Spell check! Check your grammar. This is professionally important.

A Template For Your Powerpoint Presentations: Be Consistent
Your document pages and Powerpoint slides should have a consistent look.  It's a good idea to create a "formatted template" that you can copy over and over again for slides. Just copy the template and then fill out the slides, as needed. As a suggestion, after you make the very first slide of your Powerpoint presentation, make a "template slide" that you can copy over and over again for the rest of your slides.

• The first slide of a Powerpoint presentation can be in any format. It is unique.
• However, the remaining slides should have the same format. To do this, create the second slide that contains a title with some narrative text. Then, copy that slide over and over again. When you edit the slides, the slides will have the same "look and feel" of a consistent format.

Readability Of Powerpoint Slides
Create a title in the format of your choose. Type in some "placeholder text" describing the format. Here is one example of a recommended format for Powerpoint presentations:

• Title Text, Arial 40, bold, centered. Every slide should have its own title.
• Main text (narrative text), Arial 36, plain, left-justified. (Don't center your main text).
• Caption text, Arial 28, plain, centered directly under an image.