I know, I know. This is a stupid question.

I've been playing FPS games for decades, including many with inventory systems. But this one has me stumped. I want to reposition items in my inventory. I can easily grab and drag them to get them moving, or choose "Move" from the dropdown menu, but how the h*** do I drop them once they're positioned where I want?

I clicked every mouse button and pressed every key for every command in the game, and nothing works. The item I'm moving remains "stuck" to the mouse cursor. Only exiting the inventory screen will unstick it, and then it's back to it's original location.

The fact that I even have to ask this question reveals remarkably bad game design, but I'd still like to know the "trick".

BTW I should mention that I use the mouse with my left hand and have my primary and secondary mouse buttons reversed in system settings. DXMD doesn't recognize this reversal which makes several interactions (like hacking) awkward, but at least they're doable. Maybe the inventory is a case where reversing mouse buttons is a fatal mistake?

I agree that inventory sorting in this game is very clunky. Tho normally to drop items that you are in the process of moving, you just click the primary mouse button over empty inventory cells of the appropriate size.
I've also had mouse clicks not register sometimes, but nothing like you are describing. Maybe it does indeed have to do with your unusual setup.

Thanks for the response. I tried setting my system settings to the "normal" setting where LMB is primary and RMB is secondary, but it had no effect. I still have the issue.

However, further experiments reveal that the item being dragged isn't stuck as I originally thought. Instead, a click while dragging first rotates the item and then attempts to drop it. If there's sufficient space to drop the item after rotating, it's dropped. Otherwise, it isn't dropped and appears to be "stuck" to the cursor.

Reversing my system mouse button settings causes the "Rotate" prompt to change from "Rotate [RMB]" to "Rotate [|LMB]" but the behavior is unchanged. (With the first prompt, clicking RMB does not rotate the item.)

Summarizing, clicking LMB while dragging an item *always* rotates it and then attempts to drop it, while clicking RMB has no effect whatsoever. This behavior persists regardless of system mouse button settings. Thus, I can't drop without rotating, or rotate without dropping, regardless of system settings or which button is clicked.

Seems odd I'd be the only one to encounter this issue, and I can't imagine what's special about my set-up that would cause it.

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Update...

Oh geez. I just figured it out. There's actually a separate key binding for "Rotate Item". When first setting my bindings, I had no idea what that meant (it doesn't say "Rotate Item in Inventory") so I left it with the default setting which is LMB. Because selecting an item is apparently hard-bound to LMB, that caused the behavior I reported in my original post. (The game ignores my Windows mouse button settings, which is annoyingly true of many games.)

The real issues are that the "Rotate" prompt is incorrect, and that the game allows me to bind multiple actions to a single key or button without any warning (which had bitten me earlier in a couple other cases too).

Anyway, if anybody else runs afoul of this SNAFU, now you know how to fix it.