diff --git a/src/ui/documentwidget.c b/src/ui/documentwidget.c

index a1b26e7f..78036ef1 100644

--- a/src/ui/documentwidget.c

+++ b/src/ui/documentwidget.c

@@ -159,6 +159,9 @@ struct Impl_DocumentWidget {

 iPtrArray      visibleLinks;

 iPtrArray      visibleWideRuns; /* scrollable blocks */

 iArray         wideRunOffsets;

+ iAnim animWideRunOffset;

+ uint16_t animWideRunId;

+ iGmRunRange animWideRunRange;

 iPtrArray      visiblePlayers; /* currently playing audio */

 const iGmRun * grabbedPlayer; /* currently adjusting volume in a player */

 float          grabbedStartVolume;

@@ -204,6 +207,8 @@ void init_DocumentWidget(iDocumentWidget *d) {

 d->redirectCount    = 0;

 d->initNormScrollY  = 0;

 init_Anim(&d->scrollY, 0);

+ d->animWideRunId = 0;

+ init_Anim(&d->animWideRunOffset, 0);

 d->selectMark       = iNullRange;

 d->foundMark        = iNullRange;

 d->pageMargin       = 5;

@@ -270,6 +275,13 @@ void deinit_DocumentWidget(iDocumentWidget *d) {

 deinit_PersistentDocumentState(&d->mod);

}



+static void resetWideRuns_DocumentWidget_(iDocumentWidget *d) {

+ clear_Array(&d->wideRunOffsets);

+ d->animWideRunId = 0;

+ init_Anim(&d->animWideRunOffset, 0);

+ iZap(d->animWideRunRange);

+}

+

static void requestUpdated_DocumentWidget_(iAnyObject *obj) {

 iDocumentWidget *d = obj;

 const int wasUpdated = exchange_Atomic(&d->isRequestUpdated, iTrue);

@@ -386,6 +398,29 @@ static void invalidateVisibleLinks_DocumentWidget_(iDocumentWidget *d) {

 }

}



+static int runOffset_DocumentWidget_(const iDocumentWidget *d, const iGmRun *run) {

+ if (run->preId && run->flags & wide_GmRunFlag) {

+ if (d->animWideRunId == run->preId) {

+ return -value_Anim(&d->animWideRunOffset);

+ }

+ const size_t numOffsets = size_Array(&d->wideRunOffsets);

+ const int *offsets = constData_Array(&d->wideRunOffsets);

+ if (run->preId <= numOffsets) {

+ return -offsets[run->preId - 1];

+ }

+ }

+ return 0;

+}

+

+static void invalidateWideRunsWithNonzeroOffset_DocumentWidget_(iDocumentWidget *d) {

+ iConstForEach(PtrArray, i, &d->visibleWideRuns) {

+ const iGmRun *run = i.ptr;

+ if (runOffset_DocumentWidget_(d, run)) {

+ insert_PtrSet(d->invalidRuns, run);

+ }

+ }

+}

+

static void updateHover_DocumentWidget_(iDocumentWidget *d, iInt2 mouse) {

 const iWidget *w            = constAs_Widget(d);

 const iRect    docBounds    = documentBounds_DocumentWidget_(d);

@@ -762,7 +797,7 @@ static void showErrorPage_DocumentWidget_(iDocumentWidget *d, enum iGmStatusCode

 updateTheme_DocumentWidget_(d);

 init_Anim(&d->scrollY, 0);

 init_Anim(&d->sideOpacity, 0);

- clear_Array(&d->wideRunOffsets);

+ resetWideRuns_DocumentWidget_(d);

 d->state = ready_RequestState;

}



@@ -951,7 +986,7 @@ static iBool updateFromHistory_DocumentWidget_(iDocumentWidget *d) {

     reset_GmDocument(d->doc);

     d->state = fetching_RequestState;

     d->initNormScrollY = recent->normScrollY;

- clear_Array(&d->wideRunOffsets);

+ resetWideRuns_DocumentWidget_(d);

     /* Use the cached response data. */

     updateTrust_DocumentWidget_(d, resp);

     d->sourceTime = resp->when;

@@ -977,15 +1012,20 @@ static void refreshWhileScrolling_DocumentWidget_(iAny *ptr) {

 iDocumentWidget *d = ptr;

 updateVisible_DocumentWidget_(d);

 refresh_Widget(d);

- if (!isFinished_Anim(&d->scrollY)) {

+ if (d->animWideRunId) {

+ for (const iGmRun *r = d->animWideRunRange.start; r != d->animWideRunRange.end; r++) {

+ insert_PtrSet(d->invalidRuns, r);

+ }

+ }

+ if (isFinished_Anim(&d->animWideRunOffset)) {

+ d->animWideRunId = 0;

+ }

+ if (!isFinished_Anim(&d->scrollY) || !isFinished_Anim(&d->animWideRunOffset)) {

     addTicker_App(refreshWhileScrolling_DocumentWidget_, d);

 }

}



static void smoothScroll_DocumentWidget_(iDocumentWidget *d, int offset, int duration) {

- if (offset == 0) {

- return;

- }

 /* Get rid of link numbers when scrolling. */

 if (offset && d->flags & showLinkNumbers_DocumentWidgetFlag) {

     d->flags &= ~showLinkNumbers_DocumentWidgetFlag;

@@ -1030,7 +1070,8 @@ static void scrollTo_DocumentWidget_(iDocumentWidget *d, int documentY, iBool ce

 scroll_DocumentWidget_(d, 0); /* clamp it */

}



-static void scrollWideBlock_DocumentWidget_(iDocumentWidget *d, iInt2 mousePos, int delta) {

+static void scrollWideBlock_DocumentWidget_(iDocumentWidget *d, iInt2 mousePos, int delta,

+ int duration) {

 if (delta == 0) {

     return;

 }

@@ -1057,6 +1098,21 @@ static void scrollWideBlock_DocumentWidget_(iDocumentWidget *d, iInt2 mousePos,

                 insert_PtrSet(d->invalidRuns, r);

             }

             refresh_Widget(d);

+ d->selectMark = iNullRange;

+ d->foundMark = iNullRange;

+ }

+ if (duration) {

+ if (d->animWideRunId != run->preId || isFinished_Anim(&d->animWideRunOffset)) {

+ d->animWideRunId = run->preId;

+ init_Anim(&d->animWideRunOffset, oldOffset);

+ }

+ setValueEased_Anim(&d->animWideRunOffset, *offset, duration);

+ d->animWideRunRange = range;

+ addTicker_App(refreshWhileScrolling_DocumentWidget_, d);

+ }

+ else {

+ d->animWideRunId = 0;

+ init_Anim(&d->animWideRunOffset, 0);

         }

         break;

     }

@@ -1097,7 +1153,7 @@ static void checkResponse_DocumentWidget_(iDocumentWidget *d) {

         case categorySuccess_GmStatusCode:

             init_Anim(&d->scrollY, 0);

             reset_GmDocument(d->doc); /* new content incoming */

- clear_Array(&d->wideRunOffsets);

+ resetWideRuns_DocumentWidget_(d);

             updateDocument_DocumentWidget_(d, resp, iTrue);

             break;

         case categoryRedirect_GmStatusCode:

@@ -1764,6 +1820,8 @@ static iBool handleCommand_DocumentWidget_(iDocumentWidget *d, const char *cmd)

             }

         }

     }

+ invalidateWideRunsWithNonzeroOffset_DocumentWidget_(d); /* markers don't support offsets */

+ resetWideRuns_DocumentWidget_(d);

     refresh_Widget(w);

     return iTrue;

 }

@@ -2063,6 +2121,7 @@ static iBool processEvent_DocumentWidget_(iDocumentWidget *d, const SDL_Event *e

     if (ev->wheel.which == 0) { /* Trackpad with precise scrolling w/inertia. */

         stop_Anim(&d->scrollY);

         iInt2 wheel = init_I2(ev->wheel.x, ev->wheel.y);

+ /* Only scroll on one axis at a time. */

         if (iAbs(wheel.x) > iAbs(wheel.y)) {

             wheel.y = 0;

         }

@@ -2070,7 +2129,7 @@ static iBool processEvent_DocumentWidget_(iDocumentWidget *d, const SDL_Event *e

             wheel.x = 0;

         }

         scroll_DocumentWidget_(d, -wheel.y * get_Window()->pixelRatio * acceleration);

- scrollWideBlock_DocumentWidget_(d, mouseCoord, wheel.x * get_Window()->pixelRatio);

+ scrollWideBlock_DocumentWidget_(d, mouseCoord, wheel.x * get_Window()->pixelRatio, 0);

     }

     else

#endif

@@ -2092,7 +2151,7 @@ static iBool processEvent_DocumentWidget_(iDocumentWidget *d, const SDL_Event *e

                 /* accelerated speed for repeated wheelings */

                 (!isFinished_Anim(&d->scrollY) && pos_Anim(&d->scrollY) < 0.25f ? 0.5f : 1.0f));

         scrollWideBlock_DocumentWidget_(

- d, mouseCoord, ev->wheel.x * lineHeight_Text(paragraph_FontId));

+ d, mouseCoord, ev->wheel.x * lineHeight_Text(paragraph_FontId) * 3, 167);

     }

     iChangeFlags(d->flags, noHoverWhileScrolling_DocumentWidgetFlag, iTrue);

     return iTrue;

@@ -2244,6 +2303,8 @@ static iBool processEvent_DocumentWidget_(iDocumentWidget *d, const SDL_Event *e

         /* Begin selecting a range of text. */

         if (~d->flags & selecting_DocumentWidgetFlag) {

             setFocus_Widget(NULL); /* TODO: Focus this document? */

+ invalidateWideRunsWithNonzeroOffset_DocumentWidget_(d);

+ resetWideRuns_DocumentWidget_(d); /* Selections don't support horizontal scrolling. */

             iChangeFlags(d->flags, selecting_DocumentWidgetFlag, iTrue);

             d->selectMark.start = d->selectMark.end =

                 sourceLoc_DocumentWidget_(d, d->click.startPos);

@@ -2444,15 +2505,9 @@ static void drawRun_DrawContext_(void *context, const iGmRun *run) {

 const iBool        isHover =

     (run->linkId && d->widget->hoverLink && run->linkId == d->widget->hoverLink->linkId &&

      ~run->flags & decoration_GmRunFlag);

- iInt2 visPos = add_I2(run->visBounds.pos, origin);

- /* Preformatted runs can be scrolled. */

- if (run->preId && run->flags & wide_GmRunFlag) {

- const size_t numOffsets = size_Array(&d->widget->wideRunOffsets);

- const int *offsets = constData_Array(&d->widget->wideRunOffsets);

- if (run->preId <= numOffsets) {

- visPos.x -= offsets[run->preId - 1];

- }

- }

+ const iInt2 visPos = addX_I2(add_I2(run->visBounds.pos, origin),

+ /* Preformatted runs can be scrolled. */

+ runOffset_DocumentWidget_(d->widget, run));

 fillRect_Paint(&d->paint, (iRect){ visPos, run->visBounds.size }, tmBackground_ColorId);

 if (run->linkId && ~run->flags & decoration_GmRunFlag) {

     fg = linkColor_GmDocument(doc, run->linkId, isHover ? textHover_GmLinkPart : text_GmLinkPart);

@@ -3015,7 +3070,7 @@ iBool isRequestOngoing_DocumentWidget(const iDocumentWidget *d) {



void updateSize_DocumentWidget(iDocumentWidget *d) {

 setWidth_GmDocument(d->doc, documentWidth_DocumentWidget_(d));

- clear_Array(&d->wideRunOffsets);

+ resetWideRuns_DocumentWidget_(d);

 updateSideIconBuf_DocumentWidget_(d);

 updateOutline_DocumentWidget_(d);

 updateVisible_DocumentWidget_(d);