Release notes

Reading

• Fraction bars, roots, overlines and underlines are read from the fonts' own layout rules, the way TeX places them: about 20% fewer equations missed, and fewer bars misread.
• Publishers' own typesetting is read as they set it: APS journals (Physical Review), and figure labels made with matplotlib. Palatino, STIX and MathTime papers read better too.
• Equations whose rows start with words, and text inside an equation, are read as part of it.
• Fractions inside fractions, small fractions in exponents, and bars over letters read right in more fonts.
• Accents: bars and accents over letters (\bar z, \overline F, wide \widetilde and \widehat) read right in more fonts, including a journal's own narrower bar over a slanted letter. A word with an accent copies as it reads: Kähler, not Ka¨hler.

Search

• More spellings found as the same formula: \left< as \langle, \hbox as \text, \Re and \Im, \operatorname*, \slashed.

Outline and peek

• Books get their chapters in the generated outline.
• A link to a figure opens the peek with the whole figure in view.

Selection

• Text selects as in Chrome everywhere: drag, double click and triple click. Epsilon steps in only at a formula, where a selection takes whole brackets and fractions and copies as LaTeX.
• Scanned papers with a text layer select and copy their text, even when the scan is slightly tilted or turned.

Reading

• Displays with words in them read whole, and a search for a phrase inside one finds it.
• Words beside math keep their spaces when copied, and two-row cases read right.
• Older papers in plain TeX and harvmac read better, and show their real title instead of arXiv's stamp.

Outline

• More numbered headings found: subsections and subsubsections, appendices, and titles that start with math or a sign.

Links and outline

• Papers without links of their own get them: references to sections, equations, figures, tables, theorems, footnotes and citations, and the entries of a table of contents. A click goes there; Cmd or Ctrl+click opens the peek. A PDF with its own links is left as it is.
• Papers without an outline get one from their numbered headings, numbered as the page prints them, and the tab shows the paper's title. Both appear before the formulas are read.

Reading

• Cases read as cases, and matrices inside a line of text read whole.
• Wide accents and integral limits with fractions read right: almost every copy now pastes into LaTeX and compiles.
• Upright Greek told from italic, and two formulas a space apart no longer joined.

Viewer

• The peek opens at the reading view's zoom setting, and grows smoothly into the page on Expand.

Matrices

• Drag from one cell of a matrix to another to select the block between them; it copies as that submatrix, and searching for the copy finds it again.
• More matrices read by their cells, including ones with rules between rows or columns.

Reading

• Every standard symbol read as its LaTeX command, in Computer Modern, Latin Modern and Times fonts; bold symbols read bold.
• Square roots, accents, limits and stacked labels read right, so more copies compile as they are.

Viewer

• A small spinner beside the search while the formulas are still being read.
• The sidebar opens as you left it in each paper, and an open PDF comes back by itself after an update.

Selection

• A triple click on a formula takes the whole formula, every row of a display, without its number.
• On Windows and Linux, Ctrl+Shift+arrow keys step a word at a time.

Search and copy

• A match's highlight covers only its own words.
• Accents drawn as combining marks copy as LaTeX accents.

Select by formula

• A selection follows the formula's structure: drag into a bracket, a fraction or a matrix and it is taken whole; drag within one part and you get just that part.
• Shift+arrow keys add one element at a time: a letter with its scripts, a whole fraction or bracket.
• Selections are drawn as search marks: one band a line, one box round a formula. What is drawn is what is copied.
• “Select by formula” or “Select as text” in the ⋮ menu.

Copy

• Tall brackets copied at their size, as \left( … \right).

Search

• A search while a long paper is still being read answers at once from the pages read so far.
• Formulas typed as you would type them are found: psi(t,x), alpha_1, n -> ∞.
• Words through formulas: “C is a cylinder” finds “$C$ is a cylinder”.

Reading

• Formulas set in plain letters read as formulas, and inline formulas are no longer cut at a colon, a bracket or a number.
• Publishers' PDFs read better: their brackets, braces, scripts and signs.

Sign and edit

• Sign PDFs: type, draw or upload a signature, in handwriting.
• Redesigned highlight, text and drawing tools.

Viewer

• The tab shows the paper's title, not its file name.
• Two Chrome crashes avoided.

Links and sidebar

• The peek marks the whole equation or caption it lands on.
• In a narrow window the toolbar fits and the outline floats over the page.
• Highlight selected text from the right-click menu.
• PDF tabs come back by themselves after an update.

Look

• Epsilon's own look beside Chrome's, light and dark.

Outline

• The section you are reading is always marked.

Search

• About 90% of displayed equations in arXiv papers found by their TeX.
• Copy any part of a formula and find it again.

Search

• An equation is found by its number: search “(2.1)” to go to it.
• Highlights sit exactly on the words, also on justified lines.

Sidebar and peek

• Rest the pointer on the sidebar button to glance at the outline.
• The peek zooms about its middle.

Viewer

• A toolbar laid out as Chrome's own PDF viewer, with fewer, clearer options.
• “Copy link to page” in the ⋮ menu.