Some functionality that I was initially led to expect has not yet materialized. Most significant is that notes do not appear along with diagrams; they "hide" in their own separate resource. Perhaps this weakness can be remedied; I will look into the question.

I suggest that users create a workspace (a Layout, in Logos terminology) for working with the diagrams and notes. That workspace would contain at least two windows: one window for the Greek text and one for the diagrams. The Notes resource would be a separate tab within one of those windows, or perhaps it would be a third window for those who work with a wide monitor. All these windows would be linked to move together, and those wishing to work with both the SBLGNT and the NA28 versions would just double up on the tabs in each window; one for each edition. The window with Greek texts could also contain a favorite English version or two, or else the screen can be divided into 4 windows: Greek and English text in separate windows on one side of the page, and diagrams and notes in separate windows on the other (or perhaps the screen would be divided top and bottom rather than left and right sides). In this way, the Greek words are ready at hand for hyperlinking from the Greek text window while the diagrams remain visible. Saving the Layout with an appropriate name will enable you to call it up again anytime with just a couple of mouse clicks. 

A refund for buyers of the PDF version who also bought NA28 for Logos? When I announced the first Logos edition (NA28), I was hoping for a significantly faster release than eventually materialized. That hope left me fearing that some who had purchased my PDF version of those diagrams without knowing that a Logos version would be forthcoming (though I did include on the website a notice that other forms of publication were under consideration) may feel cheated by having to purchase the work twice in order to have it in Logos. So my announcement of a Logos version included a note about a possibility of working out some sort of discount arrangement for PDF buyers who wanted to abandon the PDF version and go strictly with Logos. As things unfolded, the SBLGNT diagrams came into Logos 9 at no charge, and the NA28 diagrams did not release until almost 16 months after the initial announcement. So those early buyers have had much earlier access to the work than at first I was envisioning, and many received a very similar set of Logos diagrams at no charge beyond their cost to update. I think it would also be fair for me to limit such a discount to only that portion that I actually earn as a royalty from the Logos sales; Logos deserves its portion of the sale price in order to fund the production of the diagrams. I also owe a royalty to the copyright owner of the NA28 text on each sale of the PDF version, and at this late date I could not expect the copyright owner to refund royalties paid on the sales of those PDF copies. The amount that is left for me to return as a refund, then, without having to give up a substantial portion of my own hard-earned income from the diagrams, is small enough that it hardly seems worth offering on a large scale, and doing so would require considerable further work from me to process the requests that would come in. So I am hoping that a great majority of the buyers of the PDF version will see sufficient value in that purchase to want to keep it: most have had the full 16 months of early access to the work, and the PDF has ongoing value as more readily accessible in some situations where opening Logos would be impractical or time-consuming. I do, however, invite PDF buyers who have also purchased the Logos NA28 edition and who feel in any way wronged by my inability to announce a forthcoming Logos version at the time they bought the PDF to contact me to discuss the possibility of a partial refund. I don't want any of my customers to meet me in heaven with an accusation to settle of my having cheated them!

Below is the original string of announcements that I posted to this site as these Logos editions were under development, for the sake of those who want to refer back to that information.

I would like to have announced the Logos prospect earlier, but discussions developed slowly over more than a year's time and only now have reached a point where I could do so with confidence.

Here are the details of planned Logos functionality as they have been described to me: 

As a further note to this announcement, I offer my apology to anyone who may feel harmed by having purchased the PDF in a timing that now appears to have been premature. I did include on this site, from the day I began selling the diagrams, a cautionary statement indicating the prospect of an additional form of publication. (That statement no longer appears, since this announcement renders it moot.) Still, I'll express here a willingness to consider some form of compensation for those who purchased the PDF prior to this announcement and who later purchase the Logos edition and find the PDF no longer worthwhile. I do think that some or many users will end up valuing the diagrams in both forms. I will take up this possibility once the Logos version releases and I get a feel for customer sentiment. I want to serve the Lord with integrity, and I will be sympathetic toward customers who feel any sense of having been wronged. Contact with me on this topic is welcome, using the contact form on the home page.