1 Thesis title
Capitalize the first letter of each content word
2 Chapter Titles
all capitalized
3. The font and size of the subtitle of the figure
4 [htbp] …[!t] options
Try to use [htbp]. There are many spaces in [!t] and the format is very messy. At least use [htbp] when drafting. If you need to add headers later, use [!t].