diff --git a/chromatoR/app.R b/chromatoR/app.R
index 5a79ba7..dea8a66 100644
--- a/chromatoR/app.R
+++ b/chromatoR/app.R
@@ -34,7 +34,9 @@ ui <- fluidPage(
           sidebarPanel(
             numericInput("visStart", label="Inicio", value=0),
             numericInput("visWidth", label="Bases a mostrar", value=50),
-            actionButton("butvis", "Mostrar")
+            actionButton("butvis", "Mostrar"),
+            uiOutput('tabmin'),
+            uiOutput('tabmax')
           ),
           mainPanel(
             plotOutput("visor",width=1000),
@@ -242,10 +244,22 @@ server <- function(input, output) {
     }
   })
   
+  output$tabmin<-renderUI({
+    if (!is.null(obj$seq) & input$old != ""){
+      numericInput("tabmin_num", label = "Mínimo en tabla", value = 0)
+    }
+  })
+  output$tabmax<-renderUI({
+    if (!is.null(obj$seq) & input$old != ""){
+      alignament<-msaClustalW(c("Reference"=toupper(input$old),"Predicted"=obj_ab@primarySeq %>% as.character), type="dna")
+      numericInput("tabmax_num", label = "Máximo en tabla", value = length((alignament@unmasked[2] %>% as.character() %>% strsplit(""))[[1]]))
+    }
+  })
+  
   output$visTab <- renderTable({
     observeEvent(obj$seq, {})
     
-    if (!is.null(obj$seq) & input$old != ""){
+    if (!is.null(obj$seq) & input$old != "" & !is.null(input$tabmin_num)){
       print(3)
       alignament<-msaClustalW(c("Reference"=toupper(input$old),"Predicted"=obj_ab@primarySeq %>% as.character), type="dna")
       
@@ -258,9 +272,10 @@ server <- function(input, output) {
         cons == T~"",
         TRUE~"?"
       ))
-      
       aln %>% filter(pred != "-") %>% add_column("PosChrom"=1:nrow(.)) %>% 
-        merge(aln, all=T) %>% filter(cons == "?") %>% arrange(PosAln)
+        merge(aln, all=T) %>% arrange(PosAln) %>% add_column("PosChromAnterior"=c(NA,.$PosChrom[1:(nrow(.)-1)])) %>% 
+        filter(cons == "?") %>% 
+        filter(PosAln >= input$tabmin_num & PosAln <= input$tabmax_num)
     }
   })