I am afraid you don't quite get my question. I am alright with the headings and what not. However, when it comes to captions of figures I put in the thesis, it is a different matter. They appear like this:
Table I.1 (I want it to be Table 1.1)
Figure II.4 (I want it to be Figure 2.4)



The Roman Numerals appear because I use roman numerals for my Heading 1. What do you think? Thanks

As far as the reader is concerned, what you're seeing is what matches your document: Figure II.4 is figure n° 4 within Chapter II. Visually, it's not a style of numbering I'd recommend; and what happens when you're in a discussion and someone wants to say "take a look at table XIX.3"?

It would help, too, if you explained what numbering you want within each chapter. Are there numbered subheadings? Do tables and figures use the same sequence – Table 1, Table 2, Figure 3 – or (more readable) separate sequences– Table 1, Table 2, Figure 1, Table 3, Figure 2.

The Romans have had their day <g> But the comments from Charles are still bang up to date.

I got your question just fine. I just don't have time right now to set up a document in that format to play around with. I don't know the answer off-hand. However, I am not the only volunteer answering questions here and someone else may have an answer for you before I can come up with one. My other suggestions were simply addressed to your writing a thesis with numbered headings. If you have not read Shauna Kelly's article chances are strong that your numbering structure is messed up even if you haven't seen evidence of that yet.

I'm fine with Roman numerals. I'm a lawyer and we still use Latin from time to time. My favorite is "Res ipsa loquitur." It means "the thing speaks for itself," which it obviously does not, being in Latin.

I'm OK with Roman numerals if they show up occasionally in a document, but I wouldn't want to present a numbering scheme that mixed Roman and Arabic.