Of course. >Is there a reason for this? People read left to right. You want to lay out the text in a way that is comfortable for the human eye. Center alignme

Of course. >Is there a reason for this? People read left to right. You want to lay out the text in a way that is comfortable for the human eye. Center alignment is great when you have short messages that can be read without shifting focus. It's not good to use when it extends beyond the breadth at which the eye can read without moving. It's just not what people are used to doing when they read blocs of text. Eye movement generates eyestrain, and people get annoyed when their eye strains to read, so they're more likely to get distracted and press 'back.' It can still be in the center column, but it should still be left aligned. It helps to think about it in terms of the eye's physical movements over a page. >One of the problems I aimed to solve was to reduce the "wall of text" effect by splitting it up into tabs. How can I improve this without losing sight of that goal? Yeah, I understand your intent. If you want more substantiation you can run a user test to see if people understand the layout and click through. You can also read the classic 'Don't Make Me Think' by Steve Krug, which explains why this sort of design element which seems to save space tends to confuse users. While it's an older book, the advice still holds up. You can achieve a similar result with a more modern 'long sales page' (ex. https://basecamp.com/ https://basecamp.com/). The walls of text can be broken up with headings, subheadings, and evocative images. The reason why you see the signup buttons multiple times there is to give the user a chance to convert at each stage. If the user isn't ready to sign up yet, they scroll down, get a few more reasons why they should sign up, and then repeat until they either close the tab, sign up, or click through for more information about why they should sign up. >What is the supporting copy? The text that supports your sales pitch under the different tabs that's giving the reader a reason why they should try your product. Try to condense the sentences so that only the strongest points remain, and then build out from there.