Use gamma correction on effects to improve the quality of various effects. It uses TeX fonts though, and can import and export LaTeX files. TEXMACS documents are saved as structured text files using a simple. Apply various effects such as invert, greyscale, isometric transformations, edge detect, sharpen, unsharp mask, soften, Gaussian blur, emboss, bacteria. To the contrary of LyX, TeXmacs is NOT an interface to (La)TeX, but a WYSIWYG program with an engine of its own, distinct from any engine of the TeX family. The cut and paste process may introduce errors when the formal development had none. Quickly transform image gamma, brightness, contrast, saturation, hue, posterize from a single dialog, and preview the results in real time. 
Tools to shuffle pixels, flood fill, draw straight lines, smudge, clone, paste text, draw/fill rectangle/ellipses.Texmacs-dev Patches: copy/paste and selection handling., Marc Lalaude-Labayle, 5.
• Copy and paste using rectangle or polygon shapes. When you copy a complete formula, TeXmacs views it as text content containing a math environment: text('') Pasting this into a formula results in 'encapsulating' the text content. The interaction between the different environments is remarkably transparent, e.g you can copy/paste a GP expression in TeX form, or to a different CAS. Create animations by moving layers, or shifting palettes. Image channels: Alpha, Selection, Mask. The horizontal alignment gets changed for cell (1,1) where the cursor is rather than the slot (3,3) where you clicked. In the menu, subsection Cell choose horizontal alignment and change it to some value. Position your cursor in the slot (1,1) (upper left). Extensive palette features - load, save, sort, edit, posterize, quantize, remove duplicate colours, remove unused colours, colour protection, palette shifting. mgubi Make a 3x3 table and put some data into each slot. Save and load BMP, GIF, JPEG, LSS, PNG, TGA, TIFF, XPM, XBM files. MtPaint is a painting program which can easily create pixel art and manipulate digital photos.
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