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(Tab bar · File header · Toolbar · Main work area) When you open a file in Pensiv,
you don’t just get a “document screen”;
you get a panel.
That panel contains several layers of the workspace.

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What is a panel?

A panel is one workspace unit where the file you’re working on is open.
  • One document opens in one panel.
  • One plotboard opens in one panel.
  • One sheet opens in one panel.
With split view,
you can have several panels at once. So
A panel is the container where a file is shown and worked on.

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What’s inside a panel

From top to bottom, a panel has: 
Tab bar
→ File header
→ Toolbar
→ Main work area
Each part has a clear role.

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① Tab bar — your open context

At the top of the panel is the tab bar.
It shows the files currently open in that panel.
  • You can keep several files open.
  • Click a tab to switch.
  • Move between thoughts without losing context.
Pensiv is not open‑and‑close;
it’s keep open and work in parallel.

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② File header — file info layer

Below the tabs is the file header.
It holds:
  • File path
  • Status
  • Tags
  • Connection info
  • Settings and more menu
This is not where you write content.
It’s where you manage the file’s state and structure.

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③ Toolbar — editing tools

Below the file header is the toolbar.
Here you can:
  • Set font
  • Size and line spacing
  • Alignment
  • Emphasis
  • Lists and block tools
The toolbar is for working with the file’s content.

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④ Main work area — where you think

The large area below the toolbar
is where the real work happens. In a document you write;
in a plotboard you arrange cards;
in a sheet you organize information.
This area is the center of what you’re focused on.

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Main idea about panels

A panel is not just a window.
  • Tabs keep context.
  • File header manages structure.
  • Toolbar handles content.
  • Main area is where thinking happens.
With split view,
you get more than one panel. So Pensiv is not “edit one file”;
it’s work with several panels and several thoughts in parallel.
Related: 0.5 Viewing things side by side, 9.3 Shortcuts