You can toggle Sound on or off from the upper Tools menu. ON is recommended.
You can toggle a Time Stamp on or off from the upper Tools menu. ON recommended.
You can Send a popnote using the Enter key, the Send button, or Ctrl+S 
You can automatically re-send the "last" popnote with Ctrl+Q
You can use Ctrl+U to recover your last transmitted PopNote to the Send window.
You can broadcast to all (optional) populated user buttons with F6.
You can see the Echo Round Trip Time (or Lags in m.s.) in the Status bar.
You can use Ctrl+W to restore a corrupted address file IF you used Ctrl+N beforehand.
You can run several PopNote's on one PC in IM mode using unique Ports and Folders.
You can leave PopNote in Away mode, after a chat  Away restore x minutes later.
You can use Ctrl+T to toggle through Away activation delays of 3 to 15 seconds.
You can run a VOIP client like PicoPhone (now bundled) from the PopToy menu.
You can use PopNote to chat between terminals in a private LAN (LAN mode).
You can STOP the Splash screen with Ctrl+G
You can backup your copy of PopNote.exe and its setup *.CFG's with Ctrl+N.
You can change (toggle) the runtime Icon between 4 choices with Ctrl+I.
You can manually save the current state of PopNoteA.CFG with Ctrl+L.
You can manually populate a user button with Alt+G (pick one first from address box)
You can delete a user from any User Button with the F1 thru F5 keys.
You can turn on IP address sharing with F7 (requires remote to send /USERS)
You can choose between minimize to TaskBar OR Tooltray (ToolTray is preferred).
You can force PopNote to skip a line in chat with Ctrl+J
You can Minimize PopNote with Ctrl+M or the "X" in the top right corner of GUI.
You can see what Version your buddy has by sending "/version" less quotes.
You can close PopNote by right clicking the PopNote ToolTray Icon.
You can temporarily or permanently block PopNote from popping down with Ctrl+B.
You can save popnotes current settings in its configuration file (D4.CFG) with Ctrl+F.
You can read this file (the Version history) from the "Help/Whats New" menu.
You can fast kill (or exit) PopNote anytime with Ctrl+K - but wont save defaults.
You can customize your own away message by creating an "away.txt" file.
You can reply to any past PopNote by selecting their IP first from the address window.
You can send a voice message using the PopToys WAVE and FTP Extensions.
You can send and auto view pictures using the PopToys VIEW and FTP extensions.
You can rename any Image Viewer that accepts command tails to VIEW.EXE
You can toggle Auto Record an Individuals popnote to a unique ID.TXT (Ctrl+O)
You can use PopNote's top (incoming) dialog window as a basic text editor/viewer.

More PopNote details:

The word Toggle (as used here) means click once to change, click again to reverse.
To check for upgrades: Turn Network/Monitoring to OFF, then Functions/Upgrade.
 Rt click either text dialog window for the Copy/Paste/Delete options.
The Away message edit window is accessable vi the menu Functions/Away Message.
Fonts,  font color and BG colors are changeable in the chat dialog window.
When OnTop is ON, PopNote will minimize before shelling to external programs.
The Send window will clone or use the fonts chosen for the upper chat window.
After running you can change the Send fonts vi menu "Set Font" then click Cancel.
Popnote will display (MI) and current Ports in Header Bar when in Multi Instance mode.
The ticking clock (left of status bar) also indicates PopNote is polling (listening).
Several functions stop incoming polling (clock stops) until the function completes.
The five User Buttons populate automatically with incoming popnotes.
The first 3 User Buttons are Static and will not change after being populated.
The Echo return of what you sent is positive confirmation of its delivery.
Many of PopNote's menu choices are Toggles (one click on, another click off).
There are many ways to record text chat, including but not limited to Auto Record.
The last person to PopNote always has their IP displaying in the address window.
If you include a URL in your text message, the recipient can click it to launch it.
Closing PopNote saves the current state of its user address file (PopNoteA.CFG).
CAVEAT: PopNote does not detect a change in your WAN IP after it is launched.
The FQDN/IP window also serves as an input field for resolving FQDN's.
The FQDN/IP window also serves as an input field for adding IPs.
 FTP_PN is totally secure and will not run without your approval.
 Turning "Cloak ON" stops your PopNote from Echoing back, making you invisible.
The PopToy WAVE utility records and builds sound files at 11k per second.
The PopToy VIEW utility is limited to displaying no more than 800x600 pixels.

Special Tips for multiple port (MI) operations:
* When in Multi Instances mode, PopNote's header will show (MI) + PORTS.
* On the "same" PC, each copy PopNote must run from unique folders and ports.
 * If Router not in DMZ mode then each set of unique ports must be forwarded.
* When running multiple copies, ALL copies must run in MI mode.
* Shortcut Icons can be changed to differentiate each PopNote copy.
* Use unique BG color/Font Color, GUI Size/Position etc to help ID each copy.
* Use shortcuts with command tails of ports to launch each copy.
* A Shortcut's text descriptions can be changed to reflect what ports are used.
* PopNote's Icons can be changed (Ctrl+i) to reflect the MI mode running.

BIGGEST HEADACHE SETTING UP POPNOTES: Configuring your Firewall(s) to pass
Port 54538 and 54539 in both directions. The next big headache: Running through
the various hoops to obtain a free sub domain address.

Why is a Sub Domain URL useful? It gives you a virtual static address
on the Internet, overcoming ISP's who issue dynamic (changing) IP addresses.

Using a FQDN: You must run a DNS "tickler" or "updater" on your PC that
monitors your IP and reports changes to the DNS servers supporting your URL name.
A URL, FQDN or sub domain all do the same thing, resolve vi DNS to an IP.