Printing One Slate Portal Letter Without Printing the Entire Portal

Slate portals frequently contain printable content such as:

• Honors letters.

• Scholarship notices.

• Admission letters.

• Award summaries.

• Registration confirmations.

• Student documents.

The challenge is that calling:

window.print();

prints the browser page, not necessarily the document the user thinks they are printing.

That can result in navigation, buttons, portal headers, margins, and unrelated content appearing on the printed page.

A CSS-First Print Strategy

Instead of creating an entirely separate printable page, CSS can temporarily make everything except the desired document invisible.

Assume the printable content is wrapped in:

<div class="honors_letter">
  ...
</div>

A print button can be:

<button
  class="print-honors-letter"
  type="button"
  onclick="window.print();"
>
  Print Letter
</button>

Then apply print-specific CSS:

@media print {

  @page {
    margin: 0;
  }

  html,
  body {
    margin: 0 !important;
    padding: 0 !important;
  }

  body * {
    visibility: hidden !important;
  }

  .honors_letter,
  .honors_letter * {
    visibility: visible !important;
  }

  .honors_letter {
    position: absolute !important;
    top: 0;
    left: 0;
    width: 100%;
    box-sizing: border-box;
    margin: 0 !important;
    padding: 0 !important;
  }

  .print-honors-letter {
    display: none !important;
  }

}

Why Use visibility Instead of display: none?

This distinction matters.

If you use:

body * {
  display: none;
}

you can accidentally hide one of the parent containers required to render the target document.

Once an ancestor has display: none, making a child visible again will not restore it.

Using:

visibility: hidden;

allows the target document and its descendants to be restored with:

visibility: visible;

Why Position the Letter Absolutely?

Even though invisible elements are not visible, they can still influence layout.

This:

.honors_letter {
  position: absolute;
  top: 0;
  left: 0;
}

moves the printable document out of the normal layout flow and starts it at the beginning of the printable page.

Watch for Browser Scaling

Sometimes a Slate document has been designed around portal dimensions rather than standard paper dimensions.

You may be tempted to compensate with:

zoom: 1.08;

or another scaling value.

That can work, but it should be treated as a final adjustment rather than the primary layout technique.

First fix:

• Width.

• Margins.

• Padding.

• Table dimensions.

• Box sizing.

• Fixed-width elements.

Then use scaling only if needed.

Print Testing Checklist

Always test:

• Chrome print preview.

• Letter versus A4 page sizes if relevant.

• Portrait versus landscape.

• Multi-page letters.

• Tables crossing page boundaries.

• Background graphics.

• Header/footer browser settings.

• Buttons or portal controls accidentally appearing.

Takeaway

For most Slate portal letters, you do not need a separate printable application.

A carefully scoped @media print rule can turn the existing portal content into a clean document while keeping the interactive portal unchanged.