The text size of pages can be changed, smaller sizes fitting more text in a given screen space but larger sizes being easier to read. By default each page has its own controls that set the size for that page only and for the current device only. Setting a system-wide fixed size for all pages and all devices here will remove those controls from each page.
Your browser has a built-in baseline font size it uses for all sites, and this is considered the medium font size in BibleStudy.tools, the other sizes going up or down from there. Some browsers let you set this baseline size, and if you do this you set the BibleStudy.tools medium size and the other sizes follow along. Some browsers have different baseline sizes for different types of fonts, and if your browser has a "monospaced" or "fixed width" size then BibleStudy.tools will use that as its medium.
Note that any sizes you set using the page-by-page controls are automatically remembered, but only if you're logged in. If you're not logged in each page goes back to medium when it's reloaded. Also, if you set some page-by-page sizes, then later set a system-wide size here, your page-by-page settings are ignored but not forgotton; if you turn off the system-wide fixed size then your old page-by-page sizes will be used again.
The Generate page sends a message when it begins a PDF generation batch, and again when when that batch is done. By default these messages show at the top of every one of your logged-in browser tabs (even logged-in browsers on different devices), and if you're not logged in they go to your email. Use "Email Only" if you never want on-screen messages, and use "Onscreen and Email" if you always want both.
Messages sent when a batch is done include links to that batch's PDFs. On-screen messages always have links, and emailed messages have them by default, but there are some security considerations with email links.
Email links let you view or download the linked-to file even if you're not logged in. This is convenient, but it means that anyone who has the link from an email has access to the file, until the link expires. Also, you're charged the transfer cost when a link is used, the same as if you were logged in and you viewed or downloaded the file from the Study area or from the Bible area of the site. This cost is typically just a fraction of a cent, depending on the PDF size (see the Pricing page), but keep in mind that you're charged regardless of who actually uses the link.
Use the "Email Links" setting to control whether email messages have links, and use "Email Link Expiry" to set how long email links are good for.
If you want to always open the Notes panel when clicking on a verse in the Chapters panel, turn that on here. It can be more convenient to open notes this way, but it can also open them when they're not wanted. For example, if you triple click a verse to select it for copying, you probably don't want that first click to open the Notes panel.
Likewise, if you click on an old note in the Notes panel it's pulled into the Edit Note area, but by default only if the Edit Note area is already open. The same is true when notes are focused on a study and you click on a verse in the Chapters panel. If you want to always open the Edit Note area in these cases, turn that on here.
When you type a note or a study text some special editing features are enabled by default. These are described in the help on the Chapters page, under the "Edit Note" section. They can be turned off here.
Default summaries entered in the "Chapter Summaries" panel normally can become page headers in your custom PDF Bibles, as discussed at the end of the Help on the Chapters page. Turning this off here limits custom Bibles to only your size-specific summaries. This frees you to write longer Default summaries that are just notes for your reference, but it forces you to enter every page size and point size specific summary you want in your custom Bible page headers.
Turning this off also allows the Default summary field to use the special notes editing features controlled by the "Notes Editing" setting above. If that setting above isn't turned off, and if this setting here is turned off, then special editing is active for Default chapter summaries.
When the Generate page creates PDFs, it hyphenates to reduce white space between words, which also reduces so-called "typographic rivers" that can be a distraction while reading. However, hyphenation breaks words at the end of a line, which can itself be a distraction. By default hyphenation is allowed to break only compound words where each part of the compound is also a Bible word. More aggressive hyphenation is enabled here.
For example, by default the word "bondservant" might get hyphenated, putting "bond-" at the end of a line and then "servant" at the beginning of the next line, because "bond" and "servant" are also words in the Bible. However, it can't by default be hyphenated as "bondser-" and then "vant" on the next line. Aggressive hyphenation allows this.