...

app/src/main/java/com/base/pdfviewerscannerwhite/ui/document/pdf/PdfActivity.kt

@@ -402,6 +402,7 @@ class PdfActivity : BaseActivity<ActivityPdfBinding>(), PdfView {
             override fun onMoveToChild(i: Int) {
                 binding.tvPageCount.text = "${i + 1}/${muPDFCore?.countPages()}"
                 pdfPageAdapter.changeSelectPager(i)
+                binding.rvPager.scrollToPosition(i)
                 setVerticalSeekbar(i + 1, muPDFCore?.countPages() ?: 0)
             }